Yes ~200
ESO silently fails to load them after a reloadui / zone change.
Before, if you recently changed them in the controls, they work.
So it depends on your activated addons and the total keybinds that the game + addons make.
If you want to circumvent this disable all addons you do not want to set keybinds for e.g., change the keybinds, reenable the addons you need.
This should work then, at least they save. Not sure if all will work together though.
btw, you had asked the same before ~2years ago :-)
https://www.esoui.com/forums/showthr...hlight=keybind