Description
Mailspring freezes and only intermittently works once I have started a reply in any account. I can type a couple letters out but then it beachballs. It’ll catch up maybe 30-60 seconds later, but then typing again causes beachballing again. CPU and GPU usage never seem super high (Mailspring Helper GPU and Mailspring default usually only average around 5-8% each when this is happening) but it’s definitely stuck. If I go to perform other actions while that composition is still in flight, like clicking an unrelated message for example, it’s still very much in the frozen/beachballing state, with super slow response times. Eventually, I get the following:
To Reproduce…
Steps to reproduce the behavior:
- Open an email thread
- Begin a reply
- Start typing
- After a few keystrokes, Mailspring freezes for a while.
This also happens with a new composition window as well.
Expected Behavior
For typing to be a non-issue. 
Setup
Mailspring 1.15.1
macOS Sequoia 15.4.1
Note that I also completely removed Mailspring, and all associated Library files, etc. (using AppCleaner) and reinstalled/re-setup up from scratch. Exact same behavior, which I was surprised by.
Additional Context
I’ve got 2 Gmail accounts, 2 Outlook accounts, and 1 Fastmail account.