Markdown Syntax Highlighting not showing in preview

[ffrixslee]

Issue Type: Bug

Previously it was working. Now the fenced code blocks are not showing any syntax highlights in the VSCode Markdown preview. The problem is I would like to preview the markdown file in its syntax highlight before pushing commits to Github. As can be seen, the syntax highlights are shown in Github. Code example:

awesome = ["Papuchon", "curry", ":)"]   
also = ["Quake", "The Simons"]   
allAwesome = [awesome, also]

Extension version: 0.1.1 VS Code version: Code 1.49.0 (e790b931385d72cf5669fcefc51cdf65990efa5d, 2020-09-10T13:22:08.892Z) OS version: Windows_NT x64 10.0.18363

System Info

|Item|Value| |---|---| |CPUs|Intel(R) Core(TM) i7-6560U CPU @ 2.20GHz (4 x 2208)| |GPU Status|2d_canvas: enabled
flash_3d: enabled
flash_stage3d: enabled
flash_stage3d_baseline: enabled
gpu_compositing: enabled
multiple_raster_threads: enabled_on
oop_rasterization: disabled_off
opengl: enabled_on
protected_video_decode: unavailable_off
rasterization: enabled
skia_renderer: disabled_off_ok
video_decode: enabled
vulkan: disabled_off
webgl: enabled
webgl2: enabled| |Load (avg)|undefined| |Memory (System)|15.59GB (7.06GB free)| |Process Argv|--crash-reporter-id 524d91ad-a30b-412d-9eb0-27ef7d9f818a| |Screen Reader|no| |VM|0%|

[davidolrik]

I also see this problem, or a variant of it.

If I have this extension enabled, all code blocks render as plain text - This includes other extensions like Markdown Preview Mermaid.

Version: 1.52.1 Commit: ea3859d4ba2f3e577a159bc91e3074c5d85c0523 Date: 2020-12-16T16:30:02.420Z (6 days ago) Electron: 9.3.5 Chrome: 83.0.4103.122 Node.js: 12.14.1 V8: 8.3.110.13-electron.0 OS: Darwin x64 20.2.0