mobile

Hey guys,
I've been trying to remedy this for a couple weeks now and am having no luck at all. The problem first started after updating from stock 4.1.2 to Slimkat 4.4.4. I'm rooted and I couldn't update over Kies, so I went straight to custom.
The Rom in general is fantastic and I would have liked to continue using it but in third party apps (snapchat) the front camera gave has the wrong aspect ratio, resulting in a stretched image and being ultimately unusable. I use snapchat a lot, and this was a dealbreaker for me. I asked in the qa thread, no reply so I tried others. The normal front camera works fine.
I've been flashing roms like crazy trying to find ones that worked for me, and I've found that the only ones that work are samsung based touchwiz ones.
I've googled around and the resounding answer is that it shouldn't be happening after CM updated, but every CM based rom results in the same issue.
I really like CM and it's derivatives and I'd like to go back to using it. Not a fan of touchwiz.


I've been through (in order):

Stock 4.1.2 (everything worked fine)
Slimkat 4.4.4 (fantastic, camera problem)
Dirtyunicorn (fantastic, camera problem)
CarbonRom (fantastic, camera problem)
CM11 (fantastic, camera problem)
AOSPA 4.6 (fantastic, camera problem)
Liquidsmooth 5.0 (favourite, but same front camera distortion)
Stock 4.4.2 (everything works, still touchwiz)
Likewise S5 4.4.2 (everything works, awesome rom, currently using)
if I try back to AOSPA 4.6 and same problem as before occurs

Every time it's a full wipe, fresh gapps install, etc

Thanks in advance.

E: All Rom versions are the current stable release as of about a week ago.
E: Using the current TWRP now, was using the current CWM touch up until I got a bootloop and had to odin in twrp to fix it.