Incompatible with Gin theme in Content region - removes all sidebar components in node edit form

Worth noting that the Content region is specifically called out in the title of this issue and description because I did debug some to find that if the masquerade block is placed in another region, this does not happen, so there's a workaround there.

I came across this also, but noticed that moving the Masquerade block above the Main Page Content block prevents the sidebar from disappearing, in case that helps with debugging.