"The key of an existing row cannot be changed"

[Kyudos]

I have a table view with some inline action toggles. The toggles each have two format rules to simulate a checkbox. In the browser test environment, these work fine and don't give any errors. But checking the toggles on/off on the app on my phone (Android) is more often than not giving an:

"Action Failed. The key if an existing row cannot be changed"

Any ideas why / how to fix?