Search for things with filed including certain item

Need help Database
1

Hello,

I am stuck in do a search for things with field that includes certain items.

Type that I have is:

・Poll; with field “tag_list” which is list of texts.

Then, i want to call a repeating group of “Polls that have certain value A among their tag_list”,

so I made a constraint as below.

スクリーンショット 2022-05-25 0.53.00

But it doesn’t show nothing.

Does anyone have solution? Thank you in advance.