Versions:
Minecraft: 1.16.1
Forge: 1.16.1-forge-32.0.75
CC-Tweaked: 1.16.1-1.90.2

Mods:
CC-Tweaked
Optifine

The 'computercraft' folder where all computers save their data is now generating in the main game folder instead of the save folders. This is now not allowing per world id # sets. So the next world you create won't reset the computer id it will just add into it

Recreating:
Make a world
Place down a pc
Open it and type: edit test
Press enter
Save it
Then go into your main game folder and it will be there instead of the save

Heh, woops. I thought I'd fixed this, but apparently not - there's still a big fat TODO sticking in IDAssigner.