-t markdown-simple_tables+multiline_tables not working with certain tables

[bpj]

I (@bpj) said on pandoc-discuss:

Shouldn't I get multiline tables if I say this?

-t markdown-simple_tables-pipe_tables-grid_tables+multiline_tables

I get simple tables in spite of -simple_tables.

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@jgm responded:

This looks like a bug. Check out Markdown writer around
line 556:

    _ | isSimple &&
         isEnabled Ext_simple_tables opts -> fmap (nest 2,) $
              pandocTable opts (all null headers) aligns' widths'
                  rawHeaders rawRows
       | isSimple &&
         isEnabled Ext_pipe_tables opts -> fmap (id,) $
              pipeTable (all null headers) aligns' rawHeaders rawRows
       | not hasBlocks &&
         isEnabled Ext_multiline_tables opts -> fmap (nest 2,) $
              pandocTable opts (all null headers) aligns' widths'
                  rawHeaders rawRows

Note that the condition for a table that has no block-level
content where simple_tables is disabled and
multiline_tables is enabled (case #3) calls the same
function as the condition for a simple table with
simple_tables enabled (case #1).

Could you please submit a bug report for this, with a simple example
to reproduce?

This happens with the tables in the file in the attached zip file. I tried to create a more simple example but can't reproduce with them. Perhaps it is the particular mix of empty cells and combining diacritical marks?

(Never mind the divs around the tables. They instruct a filter to wrap the content of cells in certain columns in spans with certain classes when producing PDF. I didn't run that filter when attempting the markdown-to-markdown conversion. Rather I selected the lines containing each table and filtered them through the command

pandoc -t markdown-simple_tables-pipe_tables-grid_tables+multiline_tables

All this from inside Vim, but that shouldn't matter.

The file with the problematic tables is zipped in this file:
multiline-tables-extension-bug.zip