Weird window resizing behavior in OF3

I have encountered a problem with window resizing. When I resize a window without a sidebar - let’s say to a half of the screen - and then I want to show the sidebar, the window expands beyond the original size of the window. However, when I resize the window to a half of the screen with the sidebar shown and then I hide it (and, possibly later, show it again) the window’s size doesn’t change. Same thing with the Inspector. I am assuming it’s not a bug, but it’s quite annoying! I hope the OmniGroup can fix this. I have included a screenshot to show what I mean. I am also sending an email to @SupportHumans. Is anyone else having this issue?
Resizing with inspector not shown and then clicking show inspector:

Resizing with inspector shown and then collapsing the inspector: