I suspect this is caused by the controller talking to the game as a Mouse whilst also being a Controller, the game has dual-input lock to prevent users accessing Aim Assist for mouse users, so when controller and mouse inputs are actuated at the same the camera jumps wildly and the game starts shooting to prevent you from cheating.
Please DICE, try to find an adequate solution for this issue.
It started happening after the most recent update…
Steam Input and the controller being two separate devices at the same time seems to be the issue. Call Of Duty has a feature that locks users from using both at once, maybe having this feature in BF6 would be great!
Simply locking the game to only look for either controller or mouse and keyboard.
I’ve tried to fix the issue modifying in-game settings and Steam Input settings but nothing seems to change the in-game anti cheat problems.

I tried tweaking settings on my Steam Controller (2 the new one, not the first one) and I can't do basic things like assign R4 to double press B (crouch button), or turn around 180 using Left pad through touch (button press, so that I can still have my thumb on right stick and catch someone behind me before they have an advantage). I also tried making the left gripsense my Tab key for pulling up scoreboard, but I tried using release press and for some odd reason the right gripsense sometimes activates Tab and I have no idea why.
Someone just needs to make a layout that I have in mind because I was trying to for half an hour but the game behaves uncontrollably, it is so frustrating.

I'm having the same issue. Using the new Steam Controller, my weapon will randomly fire a single shot at odd intervals. Sometimes it occurs in rapid succession, and other times 20-30 seconds will pass before another shot fires. When the firing occurs, the on-screen glyphs flick back to keyboard/mouse controls. Input does not matter--I can place the controller flat on my desk untouched and this behavior continues.
Additionally, with the Steam Controller connected, every key on my keyboard causes my weapon to shoot, and when typing in chat letters will get deleted at presumably the same interval the weapon firing is happening.
I have tested the controller in Destiny 2 (RIP), 007 First Light, and Lego Batman: Legacy of the Dark Knight. I am not having issues in any of those games. This appears to be a Battlefield-specific issue since the June 9th update.

valve ask to many developers not to lock it up or block the 'mixed control' situation over 10 years.
but one of reason that many multiplayer games that using anticheats are lock the player in single control type is 'make it less variables, to sense input side cheating in low digits of situations'.
already modern COD and BF are very mixed situation in fragmentized many controllers with many input method in many platform crossplay.
that they don't have much choice to force player in same types and limit it.
i was try to fund and test some analogue input type of keyboards for UBIsoft's Division1/2 and RainbowSix Siege in old days, but not much helped either in them cause not only anticheat team sides, they're whole dev team sides are not much co-operative in either user or input hardware providers.
not much strange thing when someone's studio running 'own anticheat team' instead of outsource to outsides.
at least SteamCon2 is still in supports, either BF6 is live service type that keep code changes, either if they push back to next project or add steamcon2 experiment and testing during service, DICE LA will at least listen your feedback, not like UbiSlop customer troll studio or Infinity Weirdo that reddit addictioners.

one funny thing that even same IP same distributor same company same capital,
each studio heard at user feedbacks are totally different.
Raven & Sledgehammer studio in COD are actually heard user feedback 'in-sense' way not like infinity ward break the game for reddit bots in somekind autistic way.
DICE LA get still struggle with user bases feedback but relatively much reasonable then long time infamouse in industry that DICE in Sweden.

Yeah Battlefield 6 doesn't like we use Steam controller because it thinks we are cheating...

same issue here

Same issue here.

same issue, any solution???

Same issue - any solutions??

Mine is working intermittently but I can't figure out why.

stil the issue, still no fix -,-

Thanks everyone for taking the time to report this and share your experiences. We've passed your reports and feedback on to the team for review. We appreciate your patience, and if you notice any new details, please continue sharing them here.

Same issue

Does it help if you use the workaround suggested here in
this thread
and set your controller as a 360 controller?

ill pass until u fix your game