Inset faces not working as it had been a few moments ago A few moments ago, inset faces simply created a new face inside another face as it always did. Now, either this happens (see picture 1) or the border between the new face and the old one is disproportionate (see picture 2). Any ideas what the problem could be?
Your topology is not good, you have overlapping faces and vertices, if you move your face up and move some vertices you can see that it's not a quad but an ngon, you can inset an ngon but in your case it quickly creates overlapping.

Oh and as pointed out by Csarb3d, you need to apply your scale, it will fix the second point.