Saved changes lost?

I’ve been working on a SketchUp model in July, saving as I went along.
I’ve just come back to continue work and discovered that changes made on and after July 14 are not shown, I see the model as of July 11!
Trimble Connect shows no activities after July 11 either.
What happened? Help please!
I’m working on Chrome 76.0.3809.100.