Checkboxes appear as claimed in the multimarkdown documentation. However, checking the boxes does not stick for more than a few seconds. Some boxes get unchecked, some get checked, a few seconds after I make the changes. It appears Joplin's checkbox logic somehow overrides the initial visible checkbox behavior.
Note that this is occurring when using the markdown editor, not WYSIWYG.
Joplin 1.3.10 on Windows 7, but same bug on Android
They're not supported in Markdown at all, but in supporting Multimarkdown tables, I would have assumed Joplin supported them. Is that not what the markdown extension is meant to achieve?