Changes on database reverted randomly

We are using Azure postgresql flexiable and we have observed instances in which a change (update) of a record(s) get back to it's previous value randomly.

For example, in a table that has a column named "value", when I change it from A to B, it gets changed/commited but after a while (maybe an hour), we see that the value of that record is revereted back to "A".

This is so weird and we have no clue what's happening.