I would say normally
If this was a humidity problem (incl. sweating), then it would still be a construction flaw (bad glue). I listen practically every day, sometimes for many hours (up to 8), with lots of manipulation (headphones on/off) in between when going somewhere or back to my PC. But Susvara pads are the only ones with this problem of many headphones I owned, used more frequently, and treated much worse. I am much more careful with Susvaras, but still, the problem is there repeatedly, every x months. See my other posts. I concluded it must have been a construction flaw.
On the other hand, nothing has bested Susvaras to my ears, and that is why I have been keeping them for years without looking for anything new/better. I actually sold most of my other headphones without regrets.
Regarding Hekv2 versus Susvara: Tried it once and thought the Hekv2 might sound a bit more "interesting" when comparing them shortly, but I have kept Susvaras that I appreciate more in the long term. Difficult to put this in words. It is like Susvara sounded somehow more "normal" to me at first, but it is actually their real strength.