There is currently a fee bug with Monero, that the wallet doesn’t automatically bump the fee when there is a backlog. This fee bug is causing sync issues with many wallets. The bug has already been solved with Anonero.io, and other wallets will be rolling out fixes shortly.
There are rumors that Nostr's creator is behind a spam attack. Simplified Privacy addresses this and has a ready working solution: https://simplifiedprivacy.com/monero-attack-nostr/
Tor Browser Onion: http://privacypkybrxebcjicfhgwsb3coatqechwnc5xow4udxwa6jemylmyd.onion/monero-attack-nostr/
Nostr creator is paying to prove monero can scale and resist against a spam attack. Congrats maxis, you give us strong reputation while living free in heads. Keep buying Monero to feed my miners and my bags 😃