This problem, along with general annoyances at Proton’s lack of focus on a good email experience pushed me over the edge to move to Fastmail. I’m so much happier. Proton Mail Bridge would often pin one core of my laptop CPU, draining my battery, and it was still slow to sync new email. With Fastmail, incoming mail is so fast that the verification codes are already there before I can alt tab over.
Proton’s pricing is really frustrating for me because I want to buy upgrades to only a few services like Pass and email. Your only option on their service is to select either Pass or Mail. You cannot buy both and you will be downgraded on one if you try to buy the other.
They really haven't improved Mail in a long time now. Still can't use your own keys, still can't have a clean unmangled export, still can't send using your own keys.
It's almost like Protonmail is intentionally hostile to key management outside of their control.
Same here, I've found too many bugs in Proton's email client and instead of fixing them they just release new products. FastMail support has been great, I think the developers themselves reply (some of the?) emails, going into technical details and being actually helpful.