The computers reboot and stop running the current program when you move far enough away from them to unload the terrain and return to where they are.

Useful information to include:

• Minecraft version: 1.17.1
• CC: Restitched version: v1.97.1-beta-1
• Detailed reproduction steps: Place any type of computer, move about 1000 blocks away from it and come back.

This is expected behaviour and how CC has always worked. We're trying to improve it but it's tricky - see cc-tweaked/CC-Tweaked#535 for more details.