Seems to be an issue with Supplementaries (removing either fixes the problem).
In certain areas of my world, having the atlas in hotbar causes the game to suddenly freeze along with screen tearing and visual glitches (tried to record it in obs but only the game freezing was recorded).
No crash, but the game console spits out the following every tick:
"<log4j:Event logger="net.minecraftforge.client.gui.overlay.ForgeGui" timestamp="1697448839747" level="ERROR" thread="Render thread">
log4j:Message<[CDATA[Error rendering overlay 'map_atlases:atlas']]></log4j:Message>
log4j:Throwable<[CDATA[java.lang.ArrayIndexOutOfBoundsException
]]></log4j:Throwable>
</log4j:Event>"

i need latest.log
also check all those are updated

latest.log
my bad, here you go

Latest updates (either supplementaries or atlas itself) seem to have fixed the issue, closing this for now, hopefully forever :)