Can I ask a follow-up question slightly related, so as to keep everything in one thread?
Say you have a residence permit. You plan to stay away for a period less than six months, but that involves stopping the rent from the place you are staying in anticipation of returning to a new place. So that means you have to de-register (abmelden), yet you are not going to re-register anywhere until you return. So while you are away, it is like you are in limbo, you do not actually have any Abmeldung at all...
Given that everything in Germany seems to be interlinked (1) Does this affect your residence permit at all? What if the Ausländerbehörde happens to look you up at that exact time and finds you have no Abmeldung? (2) Can you just keep on paying your public health insurance all the time you are away from Germany?