Whoever I click on, at least using WoS defaults to 1000 sats but I'm able to change mine to anything.

Also the zap icon you can change your default zap amounts.

I am running to similar issues though, using Amethyst currently. I'm not sure if it's me, the user client relations or a combination.

I never set an invoice amount as far as I'm aware. Just put my @walletofsatoshi link.