First: Thank you for your time reading and replying to my post!
I think you have misunderstood me in one point: I'm talking about two married pairs of LG H
E2 in which the problem occurs (the same I had with some E-Stream cells), while on the other hand the H
G2 I have are still fine after years of usage (I vape at rather low power settings which might contribute to that).
I use a really good analyzing charger, the old HG2s still haven't reached the "threshold" of lost capacity to make them end-of-life, while the HE2s are way newer, way less used and have developed that massive difference between both cells in both married pairs.
Thank you, that is exactly what I wanted to know and it answers my question why my HG2s, VTCs and Molicels haven't suffered from sitting sometimes charged a few weeks in the shelf waiting for their next shift

Only question remaining is: Why didn't the HE2 and E-Streams "survived" that conditions - or if it wasn't my usage but rather bad luck with them.
Again: Thank you very much for reading and answering and
Greetings from Northern Germany,
Axxe