Arms Feeling Disconnected (and Arms filling feeling disconnected)

Recently I’ve been having this feeling of my arms being disconnected from my shoulders. It’s present even on small things, an example being using a pepper grinder at arms length and feeling as if somethings not right with my arm/shoulder/torso connection.

I stopped practicing Tai Chi form when I started the UCB program as I didn’t want to be mixing things until I had some understanding of how the UCB was different to what I have been doing. I have played with form a couple of times when checking how bend etc would feel in the form, but it's on the backburner as far as a regular daily practice goes.

In regards to the 'disconnected feeling' I was curious if I still had access to the ‘connected feeling’ that I associated with that practice. So I went outside to do some form, as a kind of test . ( A test of what I’m not quite sure now - a test of my historical body?).

In the form I was looking for the filling that comes with lightly pressing the foot through a relaxing down leg/abdominal region. The filling was still available but I didn’t much care for the arm shape I had to make to get it. And, although I was able to create it with less abdominal sinking, I didn’t much care for that pressure feeling either. I am preferencing the ‘non collapse’ feeling where I am able to achieve it.

Another point is that my arms feel weaker, yet I know for a fact that on the whole I am stronger than I was four months ago. Bringing a full basket of logs down the hill feels easier than before.

So I am kind of confused as to what to do. I had a vague notion that I need to work more with the upper cavities to ‘reconnect’ the arms, I don't know if that's possible.

I do have a clearer question around stick - 'stick as stand'. I am thinking back to an earlier video explaining the weight/gravity effect of holding something at different distances to the body, increasing the 'foot pounds' and how this must effect 'stand'.  Would a downward - oops - would  a forwards strike require the cavity involvement to maintain standing  as the stick travels from behnd head to arrive horizontally at  waist level and the foot pounds increase , an anticipation of not being pulled there.