Another thing I noticed: You write about send-/receive-only, but the folder type in the screenshots isn’t actually send-/receive-only, they are both send-receive. Did you change that recently or do you just mean that things don’t change on one side but folders have always been send-receive?
And try running with -reset-deltas command line option on both sides to see if that changes anything (that will retransmit metadata, no actual data).