calling Advanced lookup table with SQL query in XLT

each time I type in the values and hover out values got vanished from xlt
then if touched any line they all go null and the xlt is not compiling anymore and I have to type the values all again evetime I touch.

this is happening at any xlt that is linked to advanced lookup table.
I have restarted the gui several times and even restarted the server.
OS used is Win2019 std and CL 20.1

.. as I mentioned after configuration tall values (@xxx) are vanished if I hover out but I still could see them if I opened the xlt with notepad++

If I touched any of the values or changed it they all got deleted even from the xlt itself and I got the error in t