Is that usually the culprit? Tough to say...usually when people mention new apps I tap them to see what they look like, but haven't really used any. flare.pub was one I clicked on for like 15 seconds recently 🤷♂️
Discussion
Its not uncommon when using your keys with new nostr apps this happens.
Try using this to restore: https://metadata.nostr.com/
It seems to be “newer” clients. nostr:npub1zafcms4xya5ap9zr7xxr0jlrtrattwlesytn2s42030lzu0dwlzqpd26k5 is it because a specific NIP is missing or any general ideas.
Op mentioned flockstr. Its difficult to know without the full multi app history.
This is where something like #nostrCI would come in - automate this type of testing, and reporting.
Otherwise its manual sleuthing using incomplete info