Filter Search Default State is not staying after filter change

We have built a user search filter that we are utilizing user meta and input filter for user to type keywords to search.

In our set up from the backend, we set the meta value to be URL Parameters and the corresponding key to pair up with our input, and then at the Fallback field, we type in ‘NULL’ so this will make the query to return empty at the initial load, which is what we want.

Now whenever I typed something in the input filter, which works as a filter, it will show the result from my keyword, and then after I clear my input, the query will not show empty anymore as it looks like it’s not taking the fallback value into consideration anymore. Please see attached GIF:
f81a78941bbfdcc36cba8834a9dbb8a3

Not sure if this is a bug, or if my setting is incorrect:
9bbc018554deb367f5e7d06737a7e4a7

Environment info

  • WordPress version: Latest version
  • Cwicly Plugin version: Latest version

bumping this, want to see if there is some workaround for this. @Araminta @Louis