I believe so, yes.
I don't know if it's mental or not.... or physical, but in my case my sticky weight is 202lbs. When I got pregnant with my eldest I was 202lbs. When I got pregnant with my youngest (after getting down to 174 and then up to 215) I was at 202lbs.... lol.
I get STUCK there every time I try and lose weight. It's really hard to push through. Another weight I get stuck at is 215 and then also 228. If you were at a specific weight for a long time... your body is comfortable there, so I personally feel like you 'pause' there because your body thinks.... 'ahhhh'... and settles into it like a comfy chair.
I always find I have to push harder and it takes a week or two longer to get past it.
That's probably more physical than mental though? Or is it all just in the head?? I totally believe though that mental blocks will stall weight loss... at least for perhaps a week or so. Eventually if you're doing everything right your body is just going to have to let go and move on regardless as to what your head is thinking.