Hello,

I have tried your file and have the same problem. I coverted the table back to range. Recreated the table with the same results.
I noticed a formula in column H "=SUBTOTAL(103,[@[Report_No]])". I copied the data from column A to G into another sheet. Created a table with it and had no problems with the filters. I then expanded the table with the formula in column H and the problem came back. I do not know why or how but I think there is an issue with the formula.

Regards