audio bug like in 19.1.3 during playback audio go off

the BUG : i start to play all work fine for some seconds, then stop to play audio (and vmeters go down).
i stop go back and restart and work fine for some period, then again stop to play audio.
i tried 20 beta to see if audio bug is disappear, but nothing.
i thought was dirty configuration, then i used a secondary disk and i tested on Sonoma, clean Install; Sequoia, clean install on Intel Mac.
- internal audio card
- external scarlet audio card
- braw / prores /h264/h265
I load in a newer database, a newer project, no custom setup

i go back to 19.1.1 version, all work fine for hours.

i hoped with 20 beta i could solve it but nothing.

if i export a project from 19.1.1/2/3/4 and import in 20 beta work fine also if in .3 and .4 give me the bug.
any idea?