Ren, keep doing what you know is right, hun. Ask the LC about it, but it may just be a matter of waiting until the supply catches up a bit more.

Have you tried switching positions with her (football hold) on that side after she gets fussy? Sometimes that can trick a bub into trying a bit harder and your let down might have occurred despite the fussiness. (Worked for my DD who has a particular aversion to the LHS and has never spent much time on there compared to the RHS).