Ignore list not working

[betovidal]

I've tried the let g:indentguides_ignorelist = ['text', 'markdown', 'json'] command in .vimrc but even after checking conceallevel is set to 0, characters are missing (i.e. underscores, square brackets, parenthesis) and all the content inside them. If I set conceallevel from that specific buffer, text is correctly shown.

Note: filetype was set to markdown. The same happens if I open an md file.

[betovidal]

~~It happened to be a problem with vim-polyglot. I'll dig into it and propose a solution.~~

I tried removing every plugin but this. It's a problem related to vim-indenguides.

[thaerkh]

I tried replicating this and was unable to, conceallevel isn't modified from default if it's in the ignore list for me. Can you give me more information on your configuration?