Has anyone had issues with Data Integration Mappings disappearing overnight?

Summary:

Mappings disappearing from Data Integrations overnight, across multiple Locations

Content (please ensure you mask any confidential information):

We've had a few instances where mappings have disappeared from multiple integrations, across a range of different locations. It seems to only be the 'Like' mappings that get deleted (not all the mappings) across multiple integrations, so we know it is not a manual change. The only way we notice is that the integrations suddenly start failing overnight, when they have been working fine.

Has anyone experienced this before and know what's causing it?

It seems to happen overnight so I wonder if something in the overnight backup process is messing with the mappings?