Okay, *that* definetely is a bug. Sorry that I misunderstood you first @Calvans_Kliens . That surely shouldn't happen.
That is very interesting, since one can't normally change the gadgets of a tanker class. I have heard of these issues before as well but they've been always one person here one person there, interestingly always on PS4. Few people have gotten it fixed with reinstalling the game, you mentioned it didn't work for you, either. But yeah.. Interesting that I've never heard of this issue from anyone but PS4 players and it's always the Tanker class, not, for example, the pilot. So this sounds like a bug, indeed.
What I honestly would do would be to take contact to an EA Advisor at the EA Support, provide them with your picture proofs as those are decisive evidence that it's your tanker class, rather than a case of spawning as a wrong class, which is bugged. Ask them could they somehow be able to reset your loadouts from their end as clearly this is some sort of a case of a loadout not loading properly.
Here's the Support link : https://help.ea.com/en/contact-us/
If you have any issues or further questions contacting the support, here's a link for that : http://answers.ea.com/t5/Technical-Issues/How-to-contact-an-Advisor-via-EA-Help/td-p/5650100
And again, sorry for misunderstanding your issue at first as spawning with a wrong class is something that happens all the time and people usually panic and report saying they lack the wrench etc as they don't know better. This one clearly isn't a case of a wrong spawn but a missing gadget and that's not something that should happen.
Good luck !