Error in decoration provider

[serranomorante]

Neovim version (nvim -v | head -n1)

NVIM 0.10... dev

Operating system/version

Arch Linux (latest)

How to reproduce the issue

cat mini.lua

-- Use Vim packages install the plugin, also work with some plugins manager such as packer.nvim
vim.o.packpath = '~/.local/share/nvim/site'
vim.cmd('packadd promise-async')
vim.cmd('packadd nvim-ufo')

-- Setting
vim.o.foldcolumn = '1'
vim.o.foldlevel = 99
vim.o.foldlevelstart = -1
vim.o.foldenable = true

local ufo = require('ufo')
ufo.setup()
vim.keymap.set('n', 'zR', ufo.openAllFolds)
vim.keymap.set('n', 'zM', ufo.closeAllFolds)

nvim --clean +'so mini.lua'

1. Execute zM
2. Execute vsplit
3. Error
   ...

Btw, didn't found the ~/.cache/nvim/ufo.log

Expected behavior

vsplit shouldn't cause an error

Actual behavior

vsplit causes an error