Issue : In Safari when click outside a readonly Mathflied with placeholders a big cursor appear in front of the readonly Mathfield

[lhotejc]

You can experience that at this URL

In Chrome it's Ok.

If you click on the line far right of the fillInTheBlank Mathfield Element (using Safari MacOS 26.2), you get a huge black cursor before the Mathfield.
And then, you can type anything inside the readonly Mathfield, outside of any prompt.

If you press the backspace key, many of the Mathfield vanish.