Big Sur: Lightroom freeze causing iMac to restart

Hello guys,

I have a 2015, 27" iMac, that I'm using for photography editing and video editing. It's been working perfectly for years now. I've "installed" an external SSD (Samsungs T5) as a bootable disc, and I'm running everything of this disc instead of the internal 1TB 5400rpm. Works like a charm. Also I've upgraded the rams to 32GB - again works like a charm.

Specs for iMac:

27" - Late 2015

3,2 GHz Quad-Core Intel Core i5

32 GB 1867 MHz DDR3

500GB (external) Samsung T5

AMD Radeon R9 M380 2 GB

My problem:

Everything has been working like a charm since yesterday, when I launched Lightroom as I usually do, and then the second I start editing, the iMac freezes and then after a minute it restarts on it's own. The screen goes black and it says "Your computer restarted because of a problem".

I thought maybe something wen't wrong in Lightroom, since this is the only application that is causing the failure. So I tried various different troubleshooting in Lightroom to make it work, like creating a new catalog and resetting all the preferences. Nothing worked, so I thought a fresh install could do it. But no.

Then I got in contact with Adobe, and after two hours we managed to get the crash report - I'll post this one down below. The Adobe employee says it's some kind of OS thread that is causing the application to freeze and therefore makes the iMac restart. I don't understand a single thing of this crash report? Can anybody help?

I've had no issues until yesterday where I upgraded from Catalina to Big Sur, and also upgraded Lightroom 9 to ligtroom 10.1.

Right now I've downgraded back to Lightroom 9, and everything seems to be working normal again, but I would love to get this solved so I could get back to Lightroom 10.

Any help would be much appreciated!

Thanks in advance

Alex