If I move forward or backwards and then move the mouse the camera view rotates even when the left mouse button is not held down. All that changed is I logged in after 8.3.7 had been applied.
Disabling raw mouse input will fix this bug.
/console rawMouseEnable 0
However, there’s a good chance of the ‘mouse snaps back to centre’ bug re-appearing because of this. Which is why people switched to raw input in the first place.
Fix what you have broken with the raw mouse input please.
Can recreate the same bug by pressing W and moving the mouse while not holding down any button. This is very annyoning and I expect a fix soon.
Disabling raw imput fixes this temporarily but brings new annyoning bugs that raw imput fixed in the first place.
Can confirm, happens to all my characters after the new patch release. When you’re moving in a direction, and then move the mouse, camera rotates as well when not holding down any mouse buttons. As if the left click is constantly held down when moving.
Still having my mouse stick in the centre of the screen while moving around sometimes after using that command, Really frustrating
You may have to explicitly set rawMouseEnable 0 every time you log in until this bug is fixed/reverted.
/console rawMouseEnable 0 fixes it but makes my camera movement all stutter and jittery and was that was the reason i had /console rawMouseEnable 1 in the first place, years ago.
This needs a fix!
Thanks for the reports everyone!
As mentioned by others the /console rawMouseEnable 0 can help, but the underlying issue has been escalated for investigation too.
You may also wish to try some of the steps here to see if these help ease the issues experienced while it’s being looked into 
Finally at least some one replied.
This is driving me insane…
For me disabling raw imput fixes this temporarily but brings other problems that raw imput fixed years ago.
Disabling raw input makes my cursor occasionally ‘sticking’ to targets, it’s like auto-aim in a way with a slight stutter
Has anybody actually asked for their cursor to rubber-band to objects?
I made a perfectly fine WoW-like camera in 200 lines of C code back in 2013 for a school project. It doesn’t need to be this fancy, guys. We just wanna move and zoom the camera with a hardware cursor 1:1 and move the mouse when not clicking a mouse button. Not hard.
I have the same problem. Whenever I move with ‘wasd’ and move my mouse without holding down mouse buttons the camera moves, it’s driving me nuts, literally unplayable. I don’t want to run a command like mentioned above cause it causes more problems such as mouse jumping all over the place and not being able to click certain things.
For anyone that’s interested the below command resolved this issue for me today:
/console cvar_default
Obviously you’re going to lose some of your customised settings but I accepted that rather than the game be almost unplayable.
Just use /console rawMouseEnable 0.
cvar_default will destroy all of your settings.
/console rawMouseEnble 0 doesn’t fix it for everyone though
None of these console commands will fix the ‘mouse getting stuck to interact-able objects’ which is rendering the game unplayable right now.
Damn this is making me dizzy and i ain’t even had alcohol yet 
I thought I was going MAD - thank god it’s not just me. My mouse is resetting to the centre/pinging off invisible walls and being a right nuisance!
Tactical dot for a broken game(current).
Seriously, fix it.
I’ve been fiddling with this as well, and i managed to find a solution that worked for me, that doesn’t involve a script. I uninstalled and reinstalled the game, which removed the problem completely. I then transfered my addon profiles and WTF folder that i had a backup; and then the problem got back.
I then tried to remove my config folder only, just as an experiment; which seems to work; no wonky camera or anything.
TLDR; I removed my config folder, and now it works for me at least.
Just tested the PTR.
Both of the issues seem to be fixed.
1 - rawMouseEnabled 0 (default). There’s no auto camera movement and the cursor hasn’t become stuck after about 10mins of clicking on Troll NPCs in Senjin Village.
2 - rawMouseEnabled 1 (to counter the old snap bug and generally have snappier mouse movement). There is no auto camera movement while moving and the sticky cursor issue doesn’t exist.
If you go on the PTR to test this make sure you go into the interface options and disable sticky targetting and any auto camera movement in the camera settings. These two options can make it feel like the camera is doing its own thing when you are testing this bug.
There’s possibly a little bit of stickiness in the vertical direction but it doesn’t feel super bad. Need others to go on PTR to comment.