@Marcin ******

You may be fined when visiting immigration for documents or do your new 90 days. If you leave Thailand before reaching 90 days, the count resets.

Right, the 90-day report is required for all visa holders except LTR. You should also follow up with your landlord about the TM30, which must be updated whenever you change your address in Thailand. Hotels update it automatically, but private landlords are often less diligent, so you’ll need to ensure it’s done when you leave and return. TM30 is not your direct responsibility but it is requested to obtain some documents.