The round Orion (Mac) app icon is becoming extremely tiny in the dock and app switcher, shortly after selecting it. Highly reproducible. Details…
- Settings > Appearance: change app icon to the round one with no background.
- Initially it seems to work as expected, but very soon it shrinks to an extremely tiny version of itself in both the dock and app switcher.

Once it’s minified, it does not appear to recover.
This has been fully reproducible for me so far over about a dozen tests.
The other two app icons do not appear to suffer from this problem. I’ve tried all three of them several times and only see it happen to the round app icon.
Likely a Tahoe thing. I checked on a Sequoia Mac, and could not reproduce it.
Version 0.99.137-beta (WebKit 623.1.8.0.0)
Tahoe (26)