While it was working before, for some reason me or my players cannot access or find any magic items I have created or added to my collection to their characters.   I modified one they had previously and now can't add it back after we deleted it.  I can find it amongst the browse homebrew magic items.  Is it a temporary glitch or am I missing something

I don't have an issue. There are a few bugs regarding item management:

1. Public homebrew added to collection then shared to others causes a crash when used by those others.
2. Manage equipment wondrous filter filters out everything, not showing wondrous items. Wondrous items can still be searched without filter.