MidSmoothness
100+ Head-Fier
I noticed some guys have issues with disconnecting mmcx connectors in general. Use the fingernail technique @davidmolliere mentioned. If you are not careful of taking out cables this will happen to no matter what earphones your taking the cables out of. In general if I like a certain cable on a phone I generally leave it on there but I am guilty of destroying some mmcx earphones myself.
Over the years I have figured out a more gentler way of taking and inserting cables. Being careful goes a long ways however.
Been searching about the 'fingernail technique' couldn't find a post from @davidmolliere for the explanation. Would appreciate it if you could tell