Free Transform tool unexpectedly back to legacy transform

Since the update where SHIFT key was no longer needed to keep aspect ratio while using Free transform I got very used to it.

But suddenly my Free transform got back to those old days and I'm frustrated about it 😞

So now I need to keep SHITF key pressed while resizing an object.

I know there is a checkbox on preferences which says Use Legacy Free Transform but it is unchecked.

Not sure if there's a command to switch from one to another mode and maybe I pressed by mistake.

The only way I got it working again is by resseting preferences, but while working after some time it changes.

If anyone had experienced this and has the solution I'll really appreciate your support.