Delphi TFDMemTable, CloneCursor and source table out of sync, unless Refresh is called

Question

the code i'm working on makes heavy usage of TFDMemTables, and clones of those tables using CloneCursor.

Sometimes, under specific conditions which I am unable to identify, the source table and its clone become out of sync: the data between them may be different, the record count as well. Calling Refresh on the cloned table puts things back in order.

From my understanding, CloneCursor is used to address the same underlying memory where data is stored, meaning alterations to the underlying data from any of the two pointers should reflect on the other table, yet allow the user to have separate filter / record positioning per "view". so how can it possibly go out of sync?

I built a small simulator, where I can insert / delete / filter records in either the table or its clone, and observe the impact on the other one. Changes were reflected correctly.

Another downside of Refresh is that it slows the execution tremendously, if overused.

Has anyone faced similar issues or found explanations / documentation regarding this matter?

Edit:

to clarify what I mean by "out of sync", it means reading a value from the table using FieldByName will return X prior to Refresh, and Y post-refresh. I was not able to reproduce this behavior on the simulator mentioned above.