SORRY FOR THE LONG MESSAGE, IT'S A COLLECTIVE COPY PASTE OF MY FINDINGS AND EXPIERENCES WITH THIS BUG. I'VE GOT QUITE A LOT OF DATA INTO IT AND AM WILLING TEST MORE WITH ANYONE WHO WANTS TO. -------
This isn't so much a "reply", but more of a "adding data to the bug report" from someone that has had it happen multiple times, and can actually easily REPEAT the bug at any time.
I too have had the same camera bug where at a sudden time, when you use any sort of "vehicle"; liz's rocket, crawford's minigun turret, ANY of the vehicles where you are actually switched from your "ON-FOOT" camera mode to being in a "Vehicle Controlling" camera mode: That is when this bug happens. Then once it happens once, it will happen EVERY time after that, no matter which vehicle or controllable gadget/item - It will always put your camera underneath the map, unable to move at all. Now you CAN still move your character. You can still drive the vehicles/operate the gadgets, but since the camera stays static in place under the map; you have no possible way to see what you're doing.
I have been able to CONSISTENTLY REPRODUCE on the map RENEWAL. I personally haven't had it happen in any other map, but it happens to me EVERY TIME on this map. And then the only way I've found to fix it-because it will persist through matches, even to different maps, regardless of which specialist you pick or vehicle you try- the only way I can "reset" it is to just shut my game down completely and the restart it.
***OH ANOTHER THING I FORGOT TO MENTION: It only happens to ME when i'm doing a "solo/co-op" gamemode. So that coincides with OP's report, and is clearly important in hunting down the bug. But yeah, once I restart the game, then I am good to go, and can play as much as I want in online multiplayer and never have the issue occur for me again. It seems to just be tied to the "solo/co-op" version of matches, as I have had it happen in solo Breakthrough, as well as solo Conquest, and any others with vehicles.
Sometimes it doesn't even happen straight away. to be honest with you I think it has to do specifically with playing as the ENGINEER/Launcher Users. An example being that I just played a breakthrough solo match on RENEWAL, and was playing as FALCK until I started getting mobbed by enemy vehicles at about 10-15min into the match. Then I switched to CRAWFORD, and was still able to operate vehicles as normal multiple times, for about 10 more minutes. Then there was a moment where I was rapidly changing seats from Driver of the CAV-Brawler to the different gunner positions, and then I tried to hop out of the vehicle really quick, and that was when the camera briefly went under the map as I hopped out.
Then from that point on if I tried to mount/enter ANY sort of vehicles at all, the camera would snap under the map, at the spot where I tried to enter/mount the "vehicle", and would then stay static there, but I could still control the vehicle;switch seats, drive, shoot, etc. I can then exit the vehicle and the camera just snaps back to where my character is, even if I had driven far away. Again; this happens with crawfords minigun turrent, ALL types of vehicles, and literally EVERYTHING in the game in which you either "mount" or "enter" it to control it.
So this even includes the pre-emplaced TOW missile launchers on certain maps, Lis's Missile Gadget. Everything where your camera stays as your main character's FPS mode is totally fine; activating doors, elevators, arming XCOMS, etc. It only happens with "vehicle/mounts", and the only fix I have found for it(and i've tried A LOT) is just to restart your game completely, and *for me personally* I just don't play RENEWAL as a "Solo/Co-op" mode. Online Multiplayer on RENEWAL is totally fine, no issues at all.
Again that is only MY experience with this bug, it could be different for others that have had it occur. This is just all the data that I have collected on it myself.
