App updates disappear from Creative Cloud app

Several times I'll notice that the Creative Cloud app has app updates for the apps I have installed. But then those updates vanish, and the Update panel says "You're up to date!"

This morning when I started my computer there were six updates listed. I clicked the "Lern more" link on one of the entries, and while I was reading the pop-up, all the updates vanished.

I don not have auto-update enavled in CC app preferences.

I don't know if CC app is deciding the updates don't apply to my machine and removing them, or if it's somehow installing them in the background. That seems unlikely since they vanish immediately, and updating apps (when they don't vanish) is pretty slow.

Now I don't know if I'm missing updates I should be getting.

I do occasionally get notifications for updates that don't disappear, and those install normally (although lately those fail about 50% of the time and I have to re-try).

Any ideas what's going on? I tried searching but all ther esults are about the CC app itself disappearing, I can't seem to write a query that filters those out.

Thanks in advance for any insight.

-Mike

My specs:

Windows 10.0.19043

CC app version 5.5.0.617