GRIM: Grim Fandango: opengl dialog transcript text errors

[arrowgent]

Please check you are including all the following information in your bug report:

ScummVM version (scummvm -v)
ScummVM 2.5.0 (Dec 1 2021 22:52:30)
Features compiled in: Vorbis FLAC MP3 ALSA SEQ sndio TiMidity RGB zLib MPEG2 FluidSynth Theora AAC A/52 FreeType2 FriBiDi JPEG PNG GIF TTS cloud (servers, local) TinyGL OpenGL (with shaders) GLEW
bionic ppa
​https://launchpad.net/~savoury1/+archive/ubuntu/games/+index?field.series_filter=bionic

Bug details, including step-by-step instructions to reproduce the bug
play game
check dialog transcript
scroll up or down until error occurs
see bottom video attachment
using opengl with shaders
i retested with "opengl" and software mode -- error does not occur

Language of game (English, German, ...)
english

Version of game (CD, Floppy, DOS, Amiga, ...)
CD + patch 1.01

Your OS, including version and device if appropriate (Windows 10 build 1709 32-bit, Debian 9.2 x86_64, Android 7.0 on Samsung Galaxy S7, ...)
Linux Ubuntu 18.04 LTS x86_64
Nvidia 1070 Driver Version: 470.86

Attach a save game if possible
attached end of year 1.

If this bug only occurred recently, please note the last version without the bug, and the first version including the bug. That way we can fix it quicker by looking at the changes made.
new release v2.5.0

Next, select the game in the 'Game' dropdown, and the game engine or other component in the 'Component' dropdown. Enter your text, and hit the button**
done

in game dialog transcript
appears to have broken text and graphics errors
doesnt effect gameplay or crashing or otherwise.
​https://clips.twitch.tv/ZealousGeniusClintmullinsTakeNRG-kBpjmgSUl_kjsi0x