Not sure this is the right place to report.
There is potential bug of escaping double quotation in the markdown format.
See an example for from here: https://markdown-test.tiddlyhost.com/
The same content is working for type vnd.tiddlywiki, but not working for type markdown.
The content is js widget which contains json object.
<$htmlwidgets type="leaflet" uuid="htmlwidget-8ad96ff5f9c219b2aa6e" data="""{"x":{"options":{"crs":{"crsClass":"L.CRS.EPSG3857","code":null,"proj4def":null,"projectedBounds":null,"options":{}}},"calls":[{"method":"addTiles","args":["https://{s}.tile.openstreetmap.org/{z}/{x}/{y}.png",null,null,{"minZoom":0,"maxZoom":18,"tileSize":256,"subdomains":"abc","errorTileUrl":"","tms":false,"noWrap":false,"zoomOffset":0,"zoomReverse":false,"opacity":1,"zIndex":1,"detectRetina":false,"attribution":"© <a href=\"https://openstreetmap.org\">OpenStreetMap<\/a> contributors, <a href=\"https://creativecommons.org/licenses/by-sa/2.0/\">CC-BY-SA<\/a>"}]},{"method":"addMarkers","args":[-36.852,174.768,null,null,null,{"interactive":true,"draggable":false,"keyboard":true,"title":"","alt":"","zIndexOffset":0,"opacity":1,"riseOnHover":false,"riseOffset":250},"The birthplace of R",null,null,null,null,{"interactive":false,"permanent":false,"direction":"auto","opacity":1,"offset":[0,0],"textsize":"10px","textOnly":false,"className":"","sticky":true},null]}],"limits":{"lat":[-36.852,-36.852],"lng":[174.768,174.768]}},"evals":[],"jsHooks":[]}"""/>
After checking browsing development console, the error is related with this part of json scripts.
\"https://openstreetmap.org\"
In the vnd.tiddlywiki format, the text keeps the same as the original text.
However, in the markdown format, the slash is removed. The text is changed into
"https://openstreetmap.org"
Are there some special thing related with markdown?