FRV freezes after renaming files

Forums: 

hello,
Like FRV a lot, but it freezes sometines
maybe it is my setup:
Apple Monterey - 12.7.4    10core intel and other intel processors  ( laptop and main computer)
but in all versions of FRV 2 (up to 2.11)  I have a problem when I rename many files.
At some point it freezes and I have to restart it - and from that point on it freezes more often after renaming.
(would also be nice if renaming would contain a find&replace option)
for the rest it works really well

Dear Sir:

What is the speed of your raw storage device according to AmorphousDiskMark or Blackmagic Disk Speed Test?

I have a very fast raid0 of four nvme that can do 1500mB/s at its worst, and more than 500mb/s at ists best.
this  is measured with BM disk speed test.