hey
can you try this in the items property of your combo box:
Table( {MonthName: Text(Today(), "MMM yyyy")}, {MonthName: Text(DateAdd(Today(), -1, Months), "MMM yyyy")}, {MonthName: Text(DateAdd(Today(), -2, Months), "MMM yyyy")} )
Ensure the DisplayFields properties of the ComboBox are set to "MonthName"
Let me know if my answer helped solving your issue.
If it did please accept as solution and give it a thumbs up so we can help others in the community.
Greetings
@Surajde