As I already said before, support replaced my battery before it even started bloating. So, write them a ticket, refer to this forum and they’ll send you a new one (if they have not run out of new batteries by now 
Although I haven’t had huge problems with my new battery, I have experienced some of the funny battery stuff that is part of this thread again with my new battery. It seems that if the phone is charging and I am extensively using the phone, e.g. for a game play more than 5 minutes, and the phone gets really hot, that then - the battery load is jumping up and down and creating problems for the following charging cycle. So for now, I am not using my phone while charging and I haven’t had any problems.
While this is not how it is supposed to be, it works for me now at the moment and I hope that the next FP will not have these problems anymore…