Messages between linked pages not always working

Steps to reproduce:

1. Please install attached test extension.
2. Open a new tab
3. Open options pages from extensions overview and press "Send Message"
   => "Message received" is shown in new tab page and in console of background page
4. Press "Send Message" inside new tab
   => "Message received" is shown in background page but not in new tab

Expected behavior:
Messages should always work like in Chrome (Test extension I did not test with Firefox).

Orion and macOS:
Version 0.99.107.16-beta (WebKit 613.1.8)
macOS 12.0.1

Image/Video: