Bevel tool doesn't work with this model

B4 its been working fine, sort of. But this time it won't bevel this particular part. It basically adds something like a loop cut to the face.

• Try converting all those ngons to quads before bevel. – Cebbi Jan 12 '17 at 10:29
• if nothing works, try to share at least a portion of your file (blend-exchange.giantcowfilms.com/)so others can inspect and perhaps resolve. – m.ardito Jan 12 '17 at 11:13

I've had this issue before, I'm not sure if this will work for you but ctrl+a -> apply scale works for me