You find info on filtering here Tabulator | JavaScript Tables & Data Grids
You have to send a command to ui-table to enable certain filters: Tabulator Filter - #3 by Christian-Me
The = filter displays only rows with data that exactly matches the filter value
So make sure that the types match so if room is a string the filter value must be string too.
if this does not work for you I think I need your flow (including demo data)