There appears to be an issue when using Experience Builder's sidebar feature. Map widgets such as the "+", "-" and the home button above the sidebar do not work when the sidebar is open, however, once the sidebar is collapsed, they operate as intended. The same issue occurs when the sidebar is located on the right side or bottom of the application. https://experience.arcgis.com/experience/e31d78321154468389cea9aecd7edecf/?draft=true

Sidebar open and no map widgets above the sidebar work.

Sidebar collapsed and map widgets above the sidebar work.