I agree, get more opinions , maybe independent of the drs you are seeing now, before moving forward with another surgery.
I think I would what more investigation & answers of why this is happening before tossing more $$ into the surgical pit.

Any suggestions of PT at all for this new thing before going forward?

There is a type of TOS that has compressions when shoulders drop down, and propping the arms in pockets, or on pillows when sitting- to take the downward pull off the BP helps..but it's not a permanent fix.

Chroma might recall the name for it , I know there was info in the useful stickys , but I can't recall the name/words to search for...