Streaming issue when I added a 2nd Mini (Bolt)

I started to immediately experience streaming issues (freezing/stuttering) when I added a 2nd Mini to my set up. No issues at all when it was just the Bolt and Mini #1.

Set Up:
Bolt - Wifi
Mini #1 - Upstairs bedroom (ethernet via Orbi Satellite)
Mini #2 (one just added that caused issue) - Main level same as Bolt. Attached ethernet via Orbi router

It's not all the time, but there are issues almost daily. Usually later in the night (9-10pm) or morning (7-8am).

Notes:
- Would it help if...

Streaming issue when I added a 2nd Mini (Bolt)

Streaming issue when I added a 2nd Mini (Bolt)