Right speaker has no sound ONLY when on bluetooth (audio jack problem)

Hi!

All of a sudden my right speaker on my headphones (Beats Solo 2 Wireless) stopped working when on bluetooth.

It works perfectly when connected via the cord to my phone (if I just connect the cord without my phone the sound cuts) OR if I jam some rolled up aluminum foil in there (if I jam it too deeply the sound cuts as well).

I opened up the left side and took a look at the audio input chip thingy, none of the wires seem damaged.

Is the issue fixable? The only sites that I see selling replacement audio input chips are in the US and it turns out to like $100 with delivery to Europe… If it’s that costly I may just buy new headphones (since I also need to replace the cushions).

Thanks in advance for any and all help! :)