Battle Pass Season 12 - Challenge Blitzkrieg

Battle Pass: Season XII, “Armour Breaking Ambusher” Challenge Blitzkrieg says:
“Destroy a specified number of player vehicles while driving a tank at a speed of at least 30 km/h”

I did that many times (with M18 etc. in AB driving more than 50 km/h) and it didn’t count!?
Any experience? Maybe I didn’t understand the goal, maybe the target should be moving more than 30 km/h, not me?

I manage to do it once in Realistic Battle

It started to work in Arcade as well.

Completed the Challenge. The catch was not to drive the vehicle automatic on MAX by double tapping E but manually by holding W.