Vim Visual Highlight Covers text in unreadable way

• [x ] I am on the latest Hyper.app version
• [x ] I have searched the issues of this repo and believe that this is not a duplicate

• OS version and name: Windows 10 - Version 10.0.17758 Build 17758
• Hyper.app version: Hyper 2.0.0
• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/srchulo/efaf2b7ee07b70f1e0d9f9d7b3bb80be
• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere):
• The issue is reproducible in vanilla Hyper.app: I believe this is true. I tried to return .hyper.js to its original state.

Issue

I'm running into an issue where no matter what theme I am using, doing visual highlighting in Vim will always cover up some of the text in an unreadable way.

Here is a screenshot before highlighting:

And here is one after I've highlighted:

Reproduce the issue in Hyper 2.0.0 on Windows 10 by opening Vim and making a visual selection, comparing the unselected and highlighted text shown in the screenshots. Trace the terminal text-selection and theme-rendering path to identify where the highlight becomes unreadable. Done means Vim visual selections remain legible across themes, with a verified reproduction and regression coverage if the project provides it.