Klipper MCU disconnect when changing glass bed for new print

Unfortunately, a bit more complex, since your error gets smaller every second since it is heating.
Lets assume it takes 5 seconds to recover a 15 degree drop:

  1. Second 1: 15 degree to target
  2. Second 2: 11 degree to target
  3. Second 3: 8 degree to target
  4. Second 4: 5 degree to target
  5. Second 5: 2 degree to target
  6. Second 6: 0 degree to target → Back on target, counter gets reset

Total Error: 41

Don’t make it overly complicated: Set the error margin to 140 and simply try it. I would guess that not much is missing.
In case of a “real” problem, the error typically accumulates fast and if Klipper reacts on it within 5 seconds or within 10 should not cause your home to burn down or your dog being abducted by aliens.