Another user today. When I asked which games were missing (to see if was a problem with a specific game) she told me this:
I'm missing:
Planet Stronghold & Colonial Defense
Heileen 3
Amber's Magic Shop
Heirs and Graces
Never Forget Me
I did notice a pattern. It only happened when I bought 4 or more in quick succession, the first three would be fine and then nothing.
So it's definitely an itch.io issue. Can someone take a look at this ? It never happened before!