Hi @Anonymous ,
Based on the issue that you mentioned, I have made a test, and the issue is confirmed on my side.
Actually, when you typed a search text within the Text Search Box, the Gallery would be reset/refreshed, and retrieve data from your data source again, so the Slider control within your Gallery would also be reset to default value.
As an alternative solution, you could consider save the Slider value back to your data source when the user made a change to the Slider value. Then Slider control would retain the value made from the user, even though, filter the Gallery items based on the Text Search box.
I have made a test on my side, please take a try with the following workaround:
Set the OnChange property of the Slider control within your Gallery to following:
Note: The Slider control references values from the NumberColumn in your data source.
More details about the Patch function, please check the following article:
Community Support Team _ Kris Dai
If this post helps, then please consider Accept it as the solution to help the other members find it more quickly.