In the large part it is probably just an annoyance to you, or that is all you consider it to be. Maybe it is on that ‘To Do’ list but keeps on making its way further down the priority list. However, it could cause major complications, ones you probably to not want to think about. Jamming and sticking uPVC doors could cause dire problems in the event of a fire and could perhaps be a means of breaking into your home.
Neither event would you want to occur, but they might, so it’s best to prepare for the eventuality than ignore it altogether.