Let me show you:
Img #1: My Tab Session setting. This session, named "Startup", should be automatically opened. 4 tabs on the left, 3 tabs on the right.
Img #2: I have MC open with a number of arbitrary tabs.
I now close and reopen MC
Img #3: MC opens with 3 tabs left, 2 tabs right. All seem to contains C:\. It seems these are the same 5 arbitrary tabs from Img #2.
Img #4: I choose the Startup tabsession manually
Img #5: Tabsession is openend correctly. I expected this to happen on startup.
Img #6: Explorer panel settings