Backtick '`' doesn't behave correctly with 'Red Hat Mono' font

[N-Onorato]

Type: Bug

To Reproduce

1. Install Red Hat Mono font
2. Set VSCode to use 'Red Hat Mono'
3. Type some text using a backtick such as example text
4. Observe the first backtick of 'example text' merge with the e as a ligature even if they are disabled.

Expected

Other editors using this font keep the backtick seperate and visible. However on MacOS the ending backtick becomes invisible which is another issue.

VS Code version: Code - Insiders 1.74.0-insider (e8eb39b, 2022-11-03T18:43:35.409Z)
OS version: Windows_NT x64 10.0.22621
Modes:
Sandboxed: Yes

System Info

Item	Value
CPUs	Intel(R) Core(TM) i7-1065G7 CPU @ 1.30GHz (8 x 1498)
GPU Status	2d_canvas: enabled canvas_oop_rasterization: disabled_off direct_rendering_display_compositor: disabled_off_ok gpu_compositing: enabled multiple_raster_threads: enabled_on opengl: enabled_on rasterization: enabled raw_draw: disabled_off_ok skia_renderer: enabled_on video_decode: enabled video_encode: enabled vulkan: disabled_off webgl: enabled webgl2: enabled webgpu: disabled_off
Load (avg)	undefined
Memory (System)	15.60GB (4.77GB free)
Process Argv	--crash-reporter-id 7211467c-3902-4862-a136-5932f43e29fb
Screen Reader	no
VM	0%

Extensions: none

A/B Experiments

vsliv695:30137379
vsins829:30139715
vsliv368cf:30146710
vsreu685:30147344
python383:30185418
vspor879:30202332
vspor708:30202333
vspor363:30204092
vslsvsres303:30308271
pythonvspyl392:30422396
pythontb:30258533
pythonptprofiler:30281269
vshan820:30294714
pythondataviewer:30285072
vscod805cf:30301675
bridge0708:30335490
bridge0723:30353136
cmake_vspar411:30581797
vsaa593cf:30376535
pythonvs932:30404738
cppdebug:30492333
vsclangdf:30492506
c4g48928:30535728
dsvsc012cf:30540253
pylantcb52:30590116
vsccc:30564266
pyindex848:30577858
nodejswelcome1:30587009
gswce1:30602633
34cci188:30599831
iaj6b796:30602301
pyind779cf:30600160

[alexdima]

VS Code is built with Electron, which is built with Chromium. The font rendering in the editor is delegated to Chromium, so the font lookup is unfortunately not directly under control. If you are able to reproduce this problem in a Chromium-based browser such as Edge or Chrome, then please report the issue directly against Chromium at https://bugs.chromium.org/p/chromium/issues/list

You can try with opening a page like the following in Chrome: https://jsfiddle.net/rjuk3tvy/

[N-Onorato]

Thank you @alexdima that makes sense. The behavior can be replicated on Chromium and Firefox browsers, so this might be a font feature I'm unaware of. I will dig into it a bit more and report the issue to chromium if needed.

[N-Onorato]

For posterity, this was an issue from the font-end of things and has been addressed. However, Google and other sources of the font don't seem to have been updated. RedHatOfficial/RedHatFont#43