Engineer 3 Class Assignment does not progress

I am currently stuck also in 0 idk why. I tried every single launcher, the stinger, the rpg, the igla, it doesn't seems to progress. I read in another forums that you have to try to make the progress on Firestrom, needless to say it didn't work a bit, got into a match, destroy a heli with a stinger, didn't count. I guess you're lucky to have at least 1,840 points. Also tried the reset form, were you reset the class 2 (just hold the reset botom on the combat engineer and that swhould do it) and nop didn't work. I am currently looking up solutions to these bug, seems that is a 70-30 chances, 70 that is bugged and 30 that also maybe be bugged but you can progress little by little. I hope there is a solution beacuse this bug is around rn for the past 5-6 months.