so I managed to fix the problem with some try and fail approaches, now it works like a charm ;)

"filters": [
      [
          "SnapshotDateText",
          [
              "{{column(SnapshotDateText_3.selection, [\"SnapshotDateText\"]).asObject()}}"
          ],
          "=="
      ]
]

the real trick was using "==" operator rather than "in".

so I managed to fix the problem with some try and fail approaches, now it works like a charm ;)

Here is my complete answer to the question.