The proprioception thing is interesting because it's also linked to things like ADHD and autism along with other sensory processing difficulties.
For me, my own poor proprioception actually feeds into my dysphoria on its own because it feels like somebody hit me with the Scale tool in Blender and added like 2 inches to all my bodily dimensions. I can't tell you how many times I've just barely smacked my head or hands on things or kicked furniture and how much frustration it has caused me with this damned flesh prison.