Overhead text - Font garbled

## Testmerges
#11128: '[code beet] dissolver (used to be venator)' by cuberound at commit 2e0f882986
#10925: 'Cape River Mining Colony - Ground Map' by Steelpoint at commit aebde05bef
#12947: 'Revert "Working multiz tacmap, round two, extra buttons"' by Rain7x at commit ea384007a4
#12627: 'Tyrargo Rift (2) - Various Alterations' by Steelpoint at commit f38ce6b980

## Round ID
36331

## Description of the bug
The Speech bubbles above mobs are unable to be read for me.
I can't see what someone says without looking into the chat.
So Locally it is pretty annoying.

## What's the difference with what should have happened?
I should be able to read and understand the things that people say also Locally not just on the radio when i look in the chat.

## How do we reproduce this bug?
?

## Attached logs
```
N/A
```

## Additional details
- Author: oldman2011
- Admin: the thepolynomer
- Note: Google said it was probably a font issue but I'm unsure. Player said it was garbled not completely missing, reset cache and was on latest byond version. Preferences were checked

Start by reproducing the unreadable speech bubbles in the BYOND client using the Round ID 36331 context, comparing overhead text with the chat output. Investigate the speech-bubble and font-rendering entry point after locating it in the codebase. Done means local speech bubbles are readable and the behavior is verified against the reported case.

Written by the indexing model from the issue text.