Cubase jumps back 1 bar when hitting play???

Adding another one to the list of weird behaviour in Cubase.

Yesterday I was working for hours, no problem. Today when I sit down and open the project from yesterday, Cubase is acting up.
When I hit play, it jumps back 1 bar from the cursor and starts playback. It also doesn’t start recording when hitting record.

Apparently it’s only in this one project, the other one I was working on yesterday is fine.

I of course considered perhaps hitting a key-shortcut of some sort, but resetting app prefs did nothing…
Anyone familiar with this? I’ve googled, but tbh I have no idea how to describe this in any other way…

Turn off external sync.