When using python with the pyright lsp, I noticed that when I hover over a completion item that has a doc associated with it, the popup goes across my entire screen.
Essentially, although the content of the doc is correctly sized, the "header" takes up the whole screen.
This does not occur with everything; completion items that have signature info but no doc work correctly, like print for example:
I am on the latest version of company-box.
I am using arch.
I have seen this on both stable emacs 27.1 and 28 + pgtk.
otavioschwanck
commented
3 years ago 
Essentially, although the content of the doc is correctly sized, the "header" takes up the whole screen.
This does not occur with everything; completion items that have signature info but no doc work correctly, like print for example:
I am on the latest version of company-box. I am using arch. I have seen this on both stable emacs 27.1 and 28 + pgtk.