Over the last week, I've had two separate instances where a published PowerApp has had functionality break overnight, with no changes to the app itself. In the first instance, a layout changed such that two elements overlapped. In the second instance, dropdowns mapped to SharePoint choice fields were rendering as empty.
In both cases, republishing the form (without changing anything) fixed the issue for end users.
Obviously, this is not optimal behaviour, and I like to be able to reassure my client that this is not regular behaviour for PowerApps (which they're otherwise very happy with!)
Could you give me some idea of what might have happened, and how to avoid it in the future?