Steps to reproduce:
I was browsing (i.e. reading something, opening links in new tabs, closing tabs - not quickly) and suddenly I saw tabs opening in my window. (15-20 in total)
These tabs had been open in the past (as in: some several days, perhaps more than a week ago)
It's still happening as I'm typing this bug report.
This might be related to the most recent release, which broke the tab sync issue even further - on my most recent browser restart (after a macOS update), I had 40 tabs open (when previously my window had one or two), some of which I think had been opening again.
I'm otherwise running Orion only on my iPhone, which I hadn't been using while this was happening.
Tab sync to work correctly
Orion, OS version; hardware type:
Orion: Version 0.99.114.1-beta (WebKit 614.1.12)
macOS: Version 12.4 (21F79)
Hardware: iMac (Late-2015)