Missing photos on import Lightroom mobile

I have an iPhone 12 and had at least 10gb free last time I tried to (manually) import all photos and videos from January. When the import started, it said 225 photos were waiting to import. I did it while sleeping so I didn't get to see the message about how many failed (btw, it's super annoying that the message about failed delivery disappeares immediately), so I don't know how many, but I can see in the unit tab, there are several without the LR "stamp". 

I've tried importing the same batch many many times now and I've deleted stuff off the phone and cleaned up the cache every time, to be sure I have enough space on the phone for the task. I take a lot of videos, but we're talking 200-something items, it can't be related to space? 

I've considered leaving Lightroom for good, as these hiccups are killing me, but the task of moving everything to another platform is also daunting, so I keep torturing myself within "the ecosystem". But if imports will be this difficult, I have to give it up, as the joy of photography is eaten by Lightroom every time I want to import something from my phone.