nvim --headless -c 'autocmd User PackerComplete quitall' -c 'PackerSync' locks up when markdown-preview.nvim plugin is installed

**Describe the bug**
A clear and concise description of what the bug is.

nvim --headless -c 'autocmd User PackerComplete quitall' -c 'PackerSync' locks up when markdown-preview.nvim plugin is installed

**To Reproduce**
Steps to reproduce the behavior:
1. Install https://github.com/iamcco/markdown-preview.nvim
1. Run `nvim --headless -c 'autocmd User PackerComplete quitall' -c 'PackerSync'` in the terminal
1. The command never exits

**Expected behavior**
A clear and concise description of what you expected to happen.

The command should exit after a few seconds. This happens if I remove the mentioned plugin from the list of plugins

**Screenshots**
If applicable, add screenshots to help explain your problem.

**Desktop (please complete the following information):**
- nvim --version: v0.8.1
- git --version: 2.38.1
- Operating system/version: macOS 13.0.1
- Terminal name/version: iTerm 3.4.18

Log:

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