That's not a bug, that's a feature....
This is one of my favourite tech support chats...
Me: Also i cant move this dialog left or right, i had to change the css from inspect to see all of it
Tech Support Guy: You mean the signature window?
Me: Yes, its not draggable
Tech Support Guy: It is a default design and cannot be dragged or moved.
Me: Ok but i cant see 'Associate signature to user account' checkbox unless i change the css, what you see in that screenshot is all i can see in a full width browser on desktop
Tech Support Guy:If the web browser is zoomed out, you will be able to see that option.
Me: haha, ok
I won't name and shame but this is not a small company. Funny.