Cyrillic "Йй" looks like "Ии"

[desmitry]

Screenshots
"И И" and "и и" on the picture, expected "И Й" and "и й".

Operating system
Manjaro GNOME

Software
VS Code

[zhenyamega]

It's the same with the letters "её" and "ЕЁ"

[5ucur]

Can confirm it also happens in a word processor (not only a preview error). Here is a screenshot showcasing the issue, with comparison to Monocraft.