>All tabs are opened in a tab group, sometimes they will open a new tab group. Very confusing behaviour.

So I'm not the only one. I never figured out why sometimes tabs open in an existing group, and sometimes in a new group. Curious to find the spec which explains the behavior...

Brave has a setting to enable/disable the feature, idk if standard Chrome has it.

When clicking or using "open in new tab" from the long press menu (not "open in new tab in group")?

Yeah, it completely ruins the ability to switch to another tab: instead of the tab-switching screen having 6 tab previews, there are now 6 tab group previews with a single tab in each, and those previews are tiny, they are a quarter of the tab preview size. And closing a tab group is, again, more difficult than closing a tab because it has a ... instead of x at the top right corner.

I use Chrome on Android and have never noticed a tab group. Admittedly I don't use the browser extensively, but still. On iOS, which seems to be very similar, I've seen the "open in new tab group" button, but never used it.