@ajsadauskas @ajsadauskas.bsky.social @Vivaldi @snarfed.org I'd say it's definitely an instance block issue. Someone accidentally blocked the bridge on your instance at some point and it's not unblocking correctly or something similar.
That's the only thing I can think, unless BridgyFed blocked Vivaldi for some strange reason.
Either way, this is usually what happens when an instance block is in the way.