windows 10, when use split down / right ,and close, then crash

[luckyyezi]

• Your Hyper.app version is 3.4.1. Please verify you're using the latest Hyper.app version
• I have searched the issues of this repo and believe that this is not a duplicate

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• Any relevant information from devtools? (CMD+OPTION+I on macOS, CTRL+SHIFT+I elsewhere):

• Is the issue reproducible in vanilla Hyper.app?

Issue

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• Hyper version: undefined "3.4.1"
• OS ARCH VERSION: win32 x64 10.0.19041
• Electron: 20.3.6 LANG: undefined
• SHELL: undefined TERM: undefined

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