@ajithkrr I see what you’re talking about. I also tried my test database again and get the same thing. I think the issue is that the array (and object) fields are meant to be used by the API and not edited directly in the Content Manager. The following is from the documentation about the array field:
Allows turning a string into an “array” data type in JavaScript while working with a collection via API.
I would suggest asking Wix Customer Care about this. Meanwhile, I’ll try to found out more about this myself.