M136 AT still locked after Challenge ENGINEER SPECIALIST completed

There seems to be a bug in BATTLEFIELD 6, concerning LOADOUTS and CHALLENGES.

Workflow to reproduce: LOADOUTS > ENGINEER > GADGET 1 > M136 AT (locked, with comment "Unlocked through Challenge ENGINEER SPECIALIST 1) > F GO TO > actually there all three steps are Completed: GADGET/ M136 AT, PLAYER CARD BACKGROUND/ HEAVY WEAPONRY, SOLDIER SKIN/ BRAZER

It is not possible to TRACK any of those three CHALLENGES, this option is gray.

That is correct as I finished all those three challenges. Still in LOADOUTS > ENGINEER it is not possible to choose GADGET 1: M136 AT, it is locked.

Thank you in advance for looking into this!