Clearing the cache fixed it, but still.
Might be difficult for you to reproduce because your internet is much faster than mine, but I frequently have problems with buttons because everything loads very slowly.
nostr:npub180cvv07tjdrrgpa0j7j7tmnyl2yr6yr7l8j4s3evf6u64th6gkwsyjh6w6 I somehow managed to login twice to Wikistr, by pressing the login button before the page finished loading and displayed my npub data, and now it's sorta stuck and the app acts weird.
Discussion
But this button isn't even talking to the internet, it just gets your public key from your extension -- unless you're using NIP-46.