Some missions restart upon loading a save if they were tracked when quitting the game, to main menu or otherwise. Notable examples include:

• "The Price of Victory" contract on Kola Peninsula
• "The Star In The Sky" contract on Kola Peninsula 
• "Finder's Fee" contract on Belozersk Glades
• "The Way of Water" task on Zherbai Quarries.
  

However, this does not happen if the mission was untracked before quitting.

Issue first reported during public testing of Season 13, in PTS version 30.3.