20% increased HU fees for transferred HU vs. foreign investment

Hai. I have a question, whose answer I could not find despite google…. I drive abroad with my car in December. I come back in April. HU runs from January. So far, so clear. I have to go to HU immediately after re-entry to Germany. I have then exceeded the HU by more than 2 months. So I have to pay 20% extra for an extended exam? I think the HU will only be due for me from re-entry? Do I then have to pay the 20% more, although the H U Time limit is changed to “immediately after re-entry”, right? Lg, Mark