Amazon Q (3.96.252) plugin is not working correctly in IntelliJ IDEA 2025.2.3 (Community Edition) in Windows 11 Pro 64-bit

[poornasamy]

Describe the bug
Amazon Q (3.96.252) plugin is not working correctly in IntelliJ IDEA 2025.2.3 (Community Edition).

To reproduce
Open Amazon Q (3.96.252) in IntelliJ IDEA 2025.2.3 (Community Edition) in Windows 11 Pro 64-bit operating system, x64-based processor

Expected behavior
Amazon Q (3.96.252) plugin is working.

Screenshots

[sequestrian]

I'm seeing the same behavior in Ultimate edition. The combination of the in-chat error message, which takes up more than half my chat window, and the fact that most of the chat responses are styled wonky makes the plugin nearly unusable. This began happening after I updated IntelliJ to the latest version.

Versions:

IntelliJ IDEA 2025.2.3 (Ultimate)
Build #IU-252.26830.84
Runtime version: 21.0.8+1-b1038.72 amd64 (JCEF 122.1.9)
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.

Microsoft Windows 11 Pro Version 10.0.26100 Build 26100

In-chat error message:

body, html { background-color: var(--mynah-color-bg); color: var(--mynah-color-text-default); height: 100vh; width: 100%%; overflow: hidden; margin: 0; padding: 0; } .mynah-ui-icon-plus, .mynah-ui-icon-cancel { -webkit-mask-size: 155% !important; mask-size: 155% !important; mask-position: center; scale: 60%; } .code-snippet-close-button i.mynah-ui-icon-cancel, .mynah-chat-item-card-related-content-show-more i.mynah-ui-icon-down-open { -webkit-mask-size: 195.5% !important; mask-size: 195.5% !important; mask-position: center; aspect-ratio: 1/1; width: 15px; height: 15px; scale: 50% } .mynah-ui-icon-tabs { -webkit-mask-size: 102% !important; mask-size: 102% !important; mask-position: center; } textarea:placeholder-shown { line-height: 1.5rem; } .mynah-ui-spinner-container { contain: layout !important; } .mynah-ui-spinner-container > span.mynah-ui-spinner-logo-part { position: static !important; will-change: transform !important; } .mynah-ui-spinner-container, .mynah-ui-spinner-container > span.mynah-ui-spinner-logo-part, .mynah-ui-spinner-container > span.mynah-ui-spinner-logo-part > .mynah-ui-spinner-logo-mask.text { border: 0 !important; outline: none !important; box-shadow: none !important; border-radius: 0 !important; } select.mynah-form-input { -webkit-appearance: menulist !important; appearance: menulist !important; padding: 0 !important; } .mynah-select-handle { visibility: hidden; } .mynah-ui-spinner-container > span.mynah-ui-spinner-logo-part > .mynah-ui-spinner-logo-mask.text { will-change: transform !important; transform: translateZ(0) !important; } AWS Q const init = () => { const hybridChatConnector = connectorAdapter.initiateAdapter( true, true, true, true, true, true, true, { postMessage: message => { window.cefQuery_2146960996_1({request: '' + JSON.stringify(message),onSuccess: function(response) {},onFailure: function(error_code, error_message) {}}); } }, null, "" ) const qChat = amazonQChat.createChat( { postMessage: message => { window.cefQuery_2146960996_1({request: '' + JSON.stringify(message),onSuccess: function(response) {},onFailure: function(error_code, error_message) {}}); } }, { agenticMode: true, quickActionCommands: [], modelSelectionEnabled: true, disclaimerAcknowledged: true, pairProgrammingAcknowledged: true }, hybridChatConnector, '[]' ); window.handleNativeDrop = function(filePath) { const parsedFilePath = JSON.parse(filePath); const contextArray = parsedFilePath.map(fullPath => { const fileName = fullPath.split(/[\\/]/).pop(); return { command: fileName, label: 'image', route: [fullPath], description: fullPath }; }); qChat.addCustomContextToPrompt(qChat.getSelectedTabId(), contextArray); }; window.handleNativeNotify = function(errorMessages) { const messages = JSON.parse(errorMessages); let message = messages.join('\n'); qChat.updateStore(qChat.getSelectedTabId(), { promptInputStickyCard: { messageId: 'image-verification-banner', header: { icon: 'warning', iconStatus: 'warning', body: '### Invalid Image', }, body: message, canBeDismissed: true, }, }) }; window.setDragAndDropVisible = function(visibility) { const parsedVisibility = JSON.parse(visibility); qChat.setDragOverlayVisible(qChat.getSelectedTabId(), parsedVisibility) }; window.resetTopBarClicked = function() { qChat.resetTopBarClicked(qChat.getSelectedTabId()) }; } .mynah-ui-icon{font-style:normal;font-weight:normal;display:inline-flex;width:1em;height:1em;font-variant:normal;text-transform:none;-webkit-mask:center/100% no-repeat;mask:center/100% no-repeat;color:inherit;background-color:currentColor;aspect-ratio:1/1}.mynah-ui-icon>span{display:none}.mynah-ui-icon.status-success{color:var(--mynah-color-status-success)}.mynah-ui-icon.status-error{color:var(--mynah-color-status-error)}.mynah-ui-icon.status-warning{color:var(--mynah-color-status-warning)}.mynah-ui-icon.status-info{color:var(--mynah-color-status-info)} /*# sourceMappingURL=data:application/json;base64,{redactedTokenOfSomeKind} */body.vscode-dark, body.vscode-high-contrast:not(.vscode-high-contrast-light) { --mynah-color-light: rgba(255, 255, 255, 0.05); --mynah-color-highlight: rgba(0, 137, 255, 0.2); --mynah-color-highlight-text: rgba(0, 137, 255, 1); } /*# sourceMappingURL=data:application/json;base64,{redactedTokenOfSomeKind}data:application/json;base64,{redactedTokenOfSomeKind} */.mynah-ui-icon{font-style:normal;font-weight:normal;display:inline-flex;width:1em;height:1em;font-variant:normal;text-transform:none;-webkit-mask:center/100% no-repeat;mask:center/100% no-repeat;color:inherit;background-color:currentColor;aspect-ratio:1/1}.mynah-ui-icon>span{display:none}.mynah-ui-icon.status-success{color:var(--mynah-color-status-success)}.mynah-ui-icon.status-error{color:var(--mynah-color-status-error)}.mynah-ui-icon.status-warning{color:var(--mynah-color-status-warning)}.mynah-ui-icon.status-info{color:var(--mynah-color-status-info)} /*# sourceMappingURL=data:application/json;base64,{redactedTokenOfSomeKind} */:root{--mynah-font-family: var(--vscode-font-family), system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", "Amazon Ember", Roboto, Oxygen, Ubuntu, Cantarell, "Open Sans", "Helvetica Neue", sans-serif;font-size:var(--vscode-font-size, 13px);font-family:var(--mynah-font-family, "system-ui");--mynah-syntax-code-font-family: var(--vscode-editor-font-family);--mynah-max-width: 2560px;--mynah-sizing-base: 4px;--mynah-chat-wrapper-spacing: var(--mynah-sizing-4);--mynah-button-border-width: 1px;--mynah-border-width: 1px;--mynah-dropdown-width: calc(var(--mynah-sizing-base) * 50);--mynah-dropdown-max-height: calc(var(--mynah-sizing-base) * 50);--mynah-dropdown-min-width: calc(var(--mynah-sizing-base) * 40);--mynah-dropdown-option-min-height: var(--mynah-sizing-6);--mynah-dropdown-margin: var(--mynah-sizing-1);--mynah-color-text-default: var(--vscode-foreground);--mynah-color-text-alternate: var(--vscode-foreground, var(--mynah-color-button-reverse));--mynah-color-text-strong: var(--vscode-input-foreground);.............................................

continues for thousands of lines

[kishankathiriya-ST]

I am facing the same issue.
I am not even able to do any conversations with it because this formatting issue took up so much space that I can't scroll or do anything with this plugin. I tired uninstalling the plugin multiple times along with invalidating cache to see if it works. No luck so far.

The issue started happening after I installed the IntelliJ IDEA 2025.2.X lines of updates.
IntelliJ IDEA 2025.2.3 (Community Edition)
Build #IC-252.26830.84, built on October 2, 2025
Runtime version: 21.0.8+1-b1038.72 amd64 (JCEF 122.1.9)
VM: OpenJDK 64-Bit Server VM by JetBrains s.r.o.

Windows 11 Pro - 24H2
OS build 26100.6899

[kishankathiriya-ST]

The issue is fixed for me once I updated my IntelliJ IDEA to the latest version 2025.2.4 which came out on 23rd Oct 2025.