So it seems that Nintendo had produced a revision of the mechanical design of the stick, but apparently that was not enough to suppress the problem at 100%.
In the industry we nearly never completly suppress a statistical issue, but sometimes we still manage to significantly reduce it by some revision. I hope that's the case here with this new design, and that they will continuesly do tiny revisions on the parts to keep decreasing the problem until we don't hear about it anymore.
source in this french article :
Current PB on Secret of Mana remake : 2h27 (2nd)
Strongest worldwide achievement on TGM : 1st European S13 rank
Fastest TGM3 MASTER in Europe : rank Master V in 5min10
Western record on TGM3 EASY : 1484
Current PB on Power Ranger (Game Gear) : 10min06 (World Record)
Non-geek activity : ThermalHungary