can't reproduce preview configuration

[sineptic]

Neovim version (nvim -v | head -n1)

NVIM v0.10.0

Operating system/version

Linux 6.9.3-arch1-1

How to reproduce the issue

cat mini.lua

vim.o.foldcolumn = "1" -- '0' is not bad
vim.o.foldlevel = 99 -- Using ufo provider need a large value, feel free to decrease the value
vim.o.foldlevelstart = 99
vim.o.foldenable = true
vim.o.fillchars = [[fold: ,foldopen:-,foldsep:│,foldclose:+]]

nvim --clean +'so mini.lua'

1. select all lines
2. • zf
   • za
3. select lines 2..4
4. • zf
   • za

Expected behavior

smth like this, without weird numbers

Actual behavior

in #4 same problem, but all answers doesn't have this

[kevinhwang91]

#4 (comment)