CC2351 Status unknown after short time

Hi all,
I´m using OH3 on an Raspi4 with the TI CC2351-USB-stick.
First it was working fine, but last week, suddenly the green LED on the CC2351 turned off and the Zigbee-ccordinator was no longer discovered by OH. So I ordered a new one. But even the new stick only survived a few hours. I discovered a few things, rebootet the RasPi - and the dongle is dead.
I can´t find any hints in dmesg, or the OH-logfiles.
Does anybody know of this item in OH?

Thanks for any hint,