Can not search Process Variable in TaskList when variable type is String and Value is number

I have a string variable in my process named Text and my user ,set it’s value as 123456. like this:

but when I want to search in Task list for this variable no Item Find. like this:

if my variable changed to 123456a, all things work fine. why this happened? and what should I do?
thanks for guide.

camunda version: 7.17.2

Hello my friend!

Use the “like” operator for values ​​of type String!
Look my example below:


I hope this helps.

William Robert Alves