Siril 1.2.0 stopped working and interface disappearing

I just now downloaded Siril 1.2.0.
The first thing I noticed the interface disappears partially or completely as soon as I try to adjust int3rface to window size.
However it comes back after several seconds

than I wanted to execute > star processing>starnet star removal
Siril could not find the old directory of the my previous version. than stopped responding altogether!!! (therefore no logs either) was not able to safe work till then either

I have MBP 2015, i7 running 10.15.7
I was running Siril 1.2.0-beta1 as I had some difficulties with the “rc” version.