Joy-cons move (drift) to the right?

I have a problem everytime I play e.g. Zelda Breath of the wild or fortnite drifts my left joy-con to the left. So my character moves without me touching the joy-con. This annoys animal and makes the fun totally broken.

Logically, you can't move the Joy-cons when booting the switch or during the start of the game, otherwise the neutral position will be changed! Has happened at the WIIU sometimes!

Unfortunately, this method does not solve my problem…

Really? Then it must be a defect!

Thank you for your help… NOT! I found out for myself.