Split Horizontal/Vertical, render issues when connecting/disconnecting monitors

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

• OS version and name: 10.13.6 macOS High Sierra
• Hyper.app version: Hyper 3.0.2 (stable)
• Link of a Gist with the contents of your .hyper.js: https://gist.github.com/emiljohansson/e16ce6fd114a13c478e98faeb2d453c5
• Relevant information from devtools (CMD+ALT+I on macOS, CTRL+SHIFT+I elsewhere):
• The issue is reproducible in vanilla Hyper.app:

Issue

In my projects, I always split my window using "Split Horizontal" (CMD+D) and "Split Vertical" (Shift+CMD+D) and randomly one or more of them will stop working. It seems like the canvas turns into an image and nothing works anymore. I can type and scroll, but nothing updates visually, see screenshot. If I change the size of the area, it stretches the text.
If I change the theme, the broken canvas stays the same.

I'm not sure how to consistently reproduce this, but it seems to happen only when I connect/disconnect my monitor to/from my Macbook.

It's kind of hard to see, but in the screenshot I am scrolling when the mouse cursor is not moving.

No source file or test is named. Start by reproducing the Split Horizontal and Split Vertical rendering failure in Hyper.app while connecting or disconnecting a monitor, then use the referenced DevTools entry point to inspect the canvas before and after the display change. Done means split panes continue updating visually after the monitor transition.