Another Lonewolf Achievement bugged

I’ve seen other posts regarding the Lonewolf Achievement not popping for some but none of them really had a solution that has worked for me and I’m kinda just asking around now.

I completed the Legendary Campaign solo, as far as I can tell, my service record supports that as well. I’ve also checked to make sure in game, that I have times logged for Legendary Solo of each mission but I’m stuck at 93% right now. While I was running through the campaign, I’m sure I was making progress on the Achievement as well. Other achievements have popped for me so it’s just confusing.

I’ve verified my completions and gone back to a few missions (including first two, passives, and the final mission) and sat through each cutscene but still no update on the achievement.

Anything I should try before having to force myself through the campaign again?

How about completing the first mission on easy difficulty? It worked for me.