I get a very similar problem. I got an LG CX Oled, and if I turn it off for a while (5-10mins) when I come back, the whole system will freeze. I posted it on another thread, but here it is: System freeze on resume
In case it helps, the crashlog is found here: Aug 11 19:35:30 scruffy kernel: BUG: kernel NULL pointer dereference, address: 0 - Pastebin.com
Card is a 2070 (Non-super). Gigabyte Windforce, if it matters.
I’ll keep an eye on this thread. Later I might try to trigger a crash and run the bug report tool.