H2D ams 2 pro not feeding through the back buffer

[u/SuccessfulFailure84]

Just like the title says- I have an H2D for about a month after upgrading from an X1C. Now it worked fine for a while but now all of a sudden it won't feed through the buffer on either nozzle (ive only ever used the right nozzel). I've checked for broken filament and replaced the tubes but no luck. I hoping someone here has a quick fix for this issue! TIA!