First, the list with the achievements needed for unlock this:

The Boom! achievement in Gears Tactics worth 288 pointsKill 100 enemies with Ticker explosions.I had a little problem with this achievement:
Because you need 4 achievements, every achievement gives you 25%.
I unlocked Boom! and Grubpocalypse at the same time (I already unlocked Immortal and All day achievements), but for some reason Seriously Tactical showed 75%
I had to find another mission with Tickers and finish it (Abort Mission didn't work).
Because this is an achievement that have % increase, I'll write about tracking issues in the spoiler part. I didn't have problem with tracking issues for this achievement, but I had some problems with Seriously Jacked
If you pre-ordered the game, and didn't get Cole at Act 1 Chapter 4 (if I'm not mistaken), treat this problem the same way that tracking issues. You get Cole when the problem is gone, at the end of whatever mission you are playing
Tracking issues: (If for some reason The Coalition fix the tracking issues problem, ignore the following)
*** Spoiler - click to reveal ***
Sometimes, the game just "forgets" that have to increase % for some achievements, and that progress is lost. Sadly the problem is "common" (when the problem is live, it's almost for a week)
Achievements that have 0 increase (Like Inmortal legion) unlocks without problem when the tracking issue is live, but you could have some problems with Seriously Tactical, because the game wouldn't add that 25%.
Now you can avoid this problem doing the following:
Every time that you want to know if the tracking issue is live or not, play Gears Tactics with a 2nd account.
Skip the tutorial and kill 1 enemy, then pause and choose Abort mission (% increase doesn't appear while you are playing a mission)
If you have 10% for Grubslayer (kill 10 enemies), the game is without issues and you can unlock any achievements without problems.
If you DON'T have 10%, stop playing Gears Tactics and try the next day. Rinse and repeat until you have 10%
When tracking issue is live, is global. It's like the server has some problems with tracking, and because I had 2 glitched achievements for Seriously Jacked, I had 2 dates when the tracking issue was live. Maybe this can help you to pinpoint some glitched achievements that you had unlocked that day:
The first time that I found this problem was on June, the 13th 2022 (One for All!)
The second time was on August, the 12th 2022 (Jack and the Beanstalk)