its definitely a shoulder issue, confirmed by an old teaching pro of mine who was caddying for me in a match last night.
I was watching alignmnet golf the other night and I know the right shoulder is not moving down the plane line after getting into a great position at the top. Not sure if I should be drilling the start down waggle (to be honest I don't know how to perform it) or Yoda's 'shoot the plane line'.
Either way its confused in my head.
Do you have an video?
There are a lot of reasons the right shoulder might not behave.
At address is the right wrist level? Is the right forearm too high? Is the right hand too much on top (rolled)?
A quick drill, hit some shots with your right foot back off the line a lot, with a slightly narrow stance. That presets the right hip as cleared, and will show you if you have a hip collision issue, or a right forearm\grip issue.
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