Syncronise - kdenlive 9.2-9.3 set audio referance/allign to.

I have been very happy for this function - but I have a problem using it now it just crash
when I try to align to reference.

The size of the audio is maybe to 2*1 hours recordings I need to synchronize.

It's strange it stopped working - but because it stopped working in my 9.2 installation
I did a update to 9.3 just to see if it would be working but my result was the same.

I really don't know what is the reason for the kdenlive to crash.

I can set the audio referance, but as soon I try to align a track it starts working
and the it just exists out...

Any suggestions ?