AttributeTable widget does not filter records

[Achrafelz]

Hello, I'm trying to use the option "Filter" in AttributeTable widget in order to filter records by objectid for example  when I type objectid = 1, the query sent to the server always returns a "where=1=1" but not "where= (objectid = 1)"

I am working with WAB 2.19 without Portal 

Does anyone have some propositions to explore? thnks in advance