21.02rc2 now has a script that tweaks the minimum CPU frequency and governor to "reduce" the amount of crashes the C2600 gets.
If you haven't done this already, try setting your governor to performance. Seems to help a lot of us out with stability:
If it does, it's just masking the issue for a while. The core problem remains, even with the attempted fix the devs added to the C2600 image.