App Structure doesn't display columns when class has space

Wappler Version : 3.3.2 FW7 v5 Core
Operating System : mac

Expected behavior

Column will be displayed in the App Structure panel even if the class attribute has a space ( such as when other classes are added along with ‘col’ )

Actual behavior

The column disappears from the App Structure

How to reproduce

Correct display:

Screen Shot 2020-09-18 at 7.46.39 AM1972×360 49.7 KB

Add second class - lose column:

Screen Shot 2020-09-18 at 7.47.14 AM1924×352 45.1 KB

Just add a space - lose column:

Screen Shot 2020-09-18 at 7.46.55 AM1954×396 50.3 KB