Sketchup Pro - saving issues

I have recently encountered this problem with Sketchup Pro. I save the file at a certain point, close the application, and later on, when I reopen that file is not saved at the point I thought it was but at some point previously.
So let’s say I have done three components, save the file, close application, when I reopen that file I have only two components in it.
Any idea, as I have never come across this issue with any of the previous SU versions?


did you have maybe opened the SKB backup file instead of the latest SKP?