Rejoined an endless mission i had already left? and instantly leveled a freshly forma'd frame

[Rustedrunic]

basically i was with a group farming 5 waves of Seimeni repeatedly for credits and we had a random join us one game (we had 3 people), and he decided to stay on the end missions screen at wave 5 and we extracted, then we go through another 5 waves of seimeni before which i forma my banshee and after that we start another mission then during this game (the 3rd one) i get host mitigation, but instead of kicking me into my own map on wave 3 or whatever wave we were on, it reconnects back to the game with the random we had 2 games prior who stayed after we left (He was just on wave 15), and my banshee instantly levels back to lvl 27 (from about level 10 or so), i checked my mods after the mission, and the forma polarity is still there... so this bug basically just made me skip having to level a frame i had put a forma into.