I've same problem... X button disapear when I try to close a tab on a island.
The bad thing is that it is a bug last year that did not have until the last update.
Flujo de actualización:Stable
Sistema:Manjaro Linux (x86_64; KDE)
Versión Chromium:121.0.6167.160
@mixchild I don't know. It wasn't intuitive for me to use islands. Tried dragging, ctrl right click as well as middle mouse click but whatever tabs just vanished and I couldn't quickly group existing tabs together. I probably am doing something wrong.
But I haven't had the tabs wipe since mid november last year or so.
I have a similar issue, where the top bar spacing does not work at all. It was the case a few versions prior, they fixed it, and it broke again after a short period.
It is impossible to grab the window if you have many tabs open, only place left is between the last tab and the "open closed tabs" icon...