I have the same problem. I found this tip :
"hi,
To solve this bug:
Pproheadless increases its memory buffers up to the limit of the RAM and stops the export in ame.
Just select in Ppro: Edition preference general
Optimize the memory render =
(sorry if the text is not exatly the same of the english version, but I use the french version…)
I also increase the ASIO buffer memory to 4096 and selected "32 bit" to avoid the "jkl" bug…
Xavier "
I have tested at all is fine 😉