Tagging doesn't work for me on Amethyst 9/10 times, and forwarding doesn't exist at all yet on nostr.
Discussion
Tagging works better if you looked up the pubkey before the tagging, somehow the search doesn't pick up pubkeys that you haven't seen in a while, or so. #[4]
Yep, the app prunes memory that you have not used in a while. But the online search via nostr.band should return the name, it's just slower.