Keep markdown headings open when switching buffers?

I use markdown files with #headings, a vim plug-in folds and unfolds the headings.

When I initially open a markdown file in vim, all the headings are folded.
I drill down through the headings to access a line.

I switch to another buffer, read a line, and then switch back to the previous buffer.

All the markdown headings are refolded :(
I have to drill down through the headings again to access the line I had unfolded.

Sometimes I need to reopen 2 or 3 headings.
Is there a way to keep the markdown headings open when switching buffers?
Or do you know of a markdown plugin with this desirable behavior?

Thank you.

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