'Loop play' not working for arduino

[XRAD-XRAY]

using latest github library, myDFPlayer 'Loop play' not working for arduino/C++, locks myDFPlayer .....

I am not using folders. I only have 4 sound tracks (tracks assigned 001.mytrack, etc...)

Hardware: Teensy 3.2 or Adafruit SAMD51 itsybitsy M4
when 'play loop' is called, it will lock myDFPlayer using either of these CPU's...but plays individual tracks just fine....

also, can you add:
myDFPlayer 'stop playing track' ?

THX!