ME2LE Incineration Specialist not tracking / registering.

[Jorrac]

On Insanity, using Mordin for incinerate. Through all missions / enemy types tried, no registering of incinerate achievement. Tried using to completely remove lower level enemy armour, and finish off higher level after weakening - nothing. Edited playthrough to make Shepherd engineer and gave incinerate, still nothing on multiple missions. 

[Macgarnickle]

I had this issue with Incinerate and Overload on the PS4, it seems to be a somewhat common bug.  Periodically I'll see the pop-up that one of my incinerates counted toward the achievement but so far I haven't been able to figure out any difference between the ones that counted and the ones that didn't.  I finally got the Overload achievement after using 50-60 times, still working on the Incinerate one. 

[Slab11]

My achievement tracker for Incineration Specialist shows 25/25 but the achievement is still greyed out and hasn’t unlocked. Very frustrating, as the other enemy achievements unlocked for me without issue. I’m playing on Xbox Series X.

[Slab11]

Surprisingly, the incineration specialist achievement randomly unlocked by itself about 2 days later. I wasn’t on the Xbox at the time but I got an alert on the Xbox app. I have since checked the in-game achievement tracker and the medal is no longer greyed out. Glad it finally unlocked.