I’m stuck at 98% too.
I am past re-up 50, got the A Real Gear achievement.
I completed Incon campaign pre-OP8, got That’s Inconceivable! achievement.
I mastered all hives pre-OP8, including The Hive-Past Hive.
I had all classes maxed pre-OP8, except four. I wanted to be able to knock out at least 1 per set post-OP8 just in case there was a bug and would not retroactively check, so Blademaster, Nomad, Robotics Expert, and Architect had a combined total of less than 3,000 CXP needed.
Then there’s the horde maps…
When the OP8 achievement list was posted, I had 13 regular and 28 frenzy maps left to do. I knocked a ton of frenzy out pre-OP8, but mostly ones I already did regular on. then found out it was regular or frenzy. Which should have changed my number to 8 maps and 4 classes from 19 to 20 when OP8 launched. My S5.2 started at 89%.
The evening that OP8 launched, I knocked out the last 4 classes, the 3 new maps, and 1 old map. S5.2 progress went to 91% and was stuck there while all the tracking issues were going on. When Shauny posted the tracking was fixed, my S5.2 progressed to 92%. At this point I should have been down to just 4 maps needed. But one of the old maps I did after OP8 launched was not showing I completed on Master in-game or the gears5.com/stats page.
Yesterday I decided to grind out the remaining maps and re-do ones I did since OP8 launched. Started with one still missing and re-did a new map, closed game, restarted console, relaunched game, S5.2 progress moved to 93%. Re-did the other 2 new maps, re-did the reboot process, moved it to 94%. Did another missing, and re-did the one that stats didn’t show, re-did the reboot process, and stuck at 94% still. Did last 2 I was still missing, re-did reboot process, S5.2 jumpped up to 98%. Went through every class, using it to kick leeches, except Jack of course. Re-did 3 maps I’m 99.999% sure I completed pre-OP8, just to be safe. Re-did reboot process again, still no movement on S5.2.
Only thing I can think of at this point is to redo the 5 maps I knocked out between July 30 and Aug 2, pre-OP8. All 5 show as done in-game and on stats web page. I’m not holding much hope out though, since that would only help if the tracking was messed up before the update and OP8 launched. Uggg