I've been doing rumble missions and spending dream points a lot
lately, and I haven't been receiving the gems from them for about
24 hours now. I know for sure that it's happening because one of my
galar rumble missions was bringing me back a flying gem that i
needed to buy a swablu egg from the grm collector, but when I went
to look, i still had the same number of flying gems.
The dream world is doing it as well - I sent some magikarp plushies
to Cherry_Blossom and one of them gave me a dragon gem, but again
when i went to look, it wasn't there.