Campaign progress question

The other day I was doing infinity as part of my solo legendary run. I was at the part where you get into the mantis on the infinity when my power flashed. When I hit resume campaign after turning my xbox back on, it brought me to the beginning of the mission. I have played campaign since then, but if I load it from say rally point charlie (before where my power flashed) and complete it from there will it still say I completed the mission solo legendary? I don’t want to waste half an hour for no progress.

Best to redo it from the start of the level. I had the same problem when i paused my game and left to deal with a pipe issue in my house. But because of the xbox auto shutoff my xbox turned off and i lost my progress. So i started from charile and i didnt get credit for the level. So save your self the trouble just do it from the very start adn make sure your online that affects it as well

damn. oh well, that stupid hold out while cortana ever so slowly opens the door was so annoying, but oh well. guess i’ll redo it this weekend or something, thanks man.