About 2 weeks ago I noticed that the left analog stick on my Nintendo Switch Joy-Cons started "drifting", that is, without touching the stick (when it was centered) it would register as off-center causing characters in games to start randomly walking in various directions, frequently downward. This obviously makes playing games rather difficult, especially when precision is required.
I confirmed the problem in System Settings under "Calibration" where I would see the stick drifting off center (And the blue + would change) when I wasn't touching the stick. Recalibration did not help (almost made the problem worse)
The controller software / firmware was up to date and after researching and finding this is a common issue, and my console and joy cons are 13 months old (1 month past warranty) I bit the bullet and bought new controllers.
Yesterday the Pro Controller which I bought separately from the console started exhibiting the same behavior. It seems like too much of a coincidence to me that two separate controllers purchased at two separate times would start having the same problem at the same time. This makes me feel like it's a software problem, not a hardware one.
Here's what the calibration tool shows when not touching the sticks:
Why are the analog sticks on my Nintendo Switch controllers all starting to drift? Is this a known issue and is there any fix? Why would it happen to two separate controllers at the same time (and always to the left stick?)