List Collector variable not searching values across multiple columns on portal

Unable to search for the 2nd column of a List Collector variable in Service Portal

Any Release

It is caused due to the underlying table of that column not being indexed to enable text search

-Goto sys_dictionary entry of the table which being accessed by the list collector variable to display the values
-Observe that Text index checkbox is unchecked.
-To index the table click on the text index checkbox and update the record
-Then click on the link "Generate Text Index" to index the table

Refer docs link below for text indexing:

Enable text indexing for a table