My experience may be a unique one with a combination of software and hardware.
When I open Telegram (1.9.3 from the repo - but also many previous versions) on Solus Budgie, my USB Blue Yeti Nano microphone starts flashing yellow, and goes back to solid red or green when I open Sound Settings (which I have permanently on my panel).
It's one of these things I have just gotten used to, but also wondering if anyone here is experiencing the same or has any idea what is happening to cause this?

6 days later

For the record, this situation is no longer happening.
When I open Telegram my USB Blue Yeti Nano stays either red or green, and does not go to flashing yellow.
Unsure if it was a Telegram or Solus update which fixed the issue, but I am happy!