The bug

Until 1.13 Minecraft's font could only support 256 distinct characters, meaning that certain characters were removed from the font due to being replaced by more important characters. Changes in 1.13 have relocated accented characters among others to dedicated files. As a result, a majority of these "removed" characters have since been reimplemented, however some remain absent.

How to reproduce

1. View these characters: ◙☼►◄↕▬↨∟⌐

Expected results

They would appear as expected in the Minecraft font, as they did in Classic.

Actual results

They all use the thin fallback font.

How to fix

Attached to this ticket is a resource pack that fixes this issue. The spaces in ascii.png that these characters formerly occupied have now been freed due to characters being relocated to separate files, meaning they can be dropped back into the file, and the font json updated to use them.