Signatures do not appear on incoming emails + images in indented text not indented

Just trying Mailspring for the first time and I’ve run into three problems within minutes and I wonder if I’m missing the settings somewhere that would fix these issues:

  1. Most incoming emails with signatures are not displaying their signatures

  2. Images that are part of indented text of incoming messages are being justified left, ignoring the indent

  3. Mailbox UI is ignoring system preferences regarding the display of dates, showing datestamps of “Nov 8, 11:28” instead of “2021-11-08 11:28”

Mailspring 1.9.2, macOS 11.6, 2020 M1 MacBook Air