Saving tab set not accurate

[BenevolentCheese]

I've been saving tab sets 0 and 1 no problem. I've tried saving tab set 2 and it's only saving a few of the tabs, not everything, and it's only saving a single column, not multiple.

[boolka]

I can't reproduce in my own so please send more detailed info. What type of files you was trying to save ? Please try to reproduce bug with different file types. Consider though there some files that cannot be properly handled (some media files for example). For some reason vscode hasn't reliable api to work with editors properly in every single case.