Bottom half of existing windows become blank when new windows are opened

[agraven]

Describe the bug
Somewhat inconsistently, one or several windows will have their bottom halves become blank when a new window is opened. It occurs most frequently when a plugin opens several new windows at once, e.g. when opening overseer.nvim or nvim-dap-ui. Lines that become blank after this remain blank until theyre scrolled out of view and back in again.

To Reproduce
Steps to reproduce the behavior:

1. Open a file in neovide
2. Run a command which opens several windows at once

Expected behavior
Windows should be rendered properly

Screenshots

Desktop (please complete the following information):

• OS: Reproduces on Ubuntu, Fedora, NixOS
• Neovide Version: Has been present since at least 0.9
• Neovim Version: Occurs with both latest stable and nightly as of 23rd of March, neovim version does not appear to affect this

Please run neovide --log and paste the contents of the .log file created in the current directory here:
neovide_rCURRENT.log

Additional context
I don't have a clear recollection of when this first started happening, but i'm reasonably certain it's been happening for at least a year

[fredizzimo]

It might be related, but :set lines= has also broke at some point