So this started happening on my daughter's Switch Lite when she went back to BotW yesterday:
When you play the game with "Aim with motion controls" enabled, they work until you hold ZR to draw your bow (or use magnesis), at which point all aiming (both motion and the analog stick) stops working and, more annoyingly, the camera position is now stuck until you teleport or die.
I have included a short (40sec) video to demonstrate: https://imgur.com/gbaCONJ
Just checked and the game works fine on my son's Switch (not a Lite). Both are running v1.6.0 of BotW. I suspect it might be a combination of the Lite and 1.6.0, as it was working previously but she did say that BotW updated itself before she started playing and noticed the issue.
There doesn't seem to be any way of removing the 1.6.0 update without removing all game data and I don't want to risk the save files.
Has anyone seen this before or have an idea what to do about it? The only workaround I've come up with is to simply not play with motion control aiming, but that's not exactly ideal.
Edit: after transferring saves and wiping all BotW data from the Switch Lite and reinstalling, I have confirmed the problem still exists with a brand new save from a clean install up update 1.6.0 (I'm unable to start the game without installing this update). It is also triggered by throwing melee weapons.