I think I figured out what was happening. When you talk to one of the guardians, you have the option to "Let's get some rest.". I kept resting "Until dawn", not realizing that the brightness was dimmer than during the middle of the day. That was my mistake. I appreciate you two looking into it.That bug is scratching my head, since I can't find what possibly could be causing that.
@Letrew , which mods are you using, other than TerraGuardians?
About the two bugs you found...
1: I know. To avoid drawing the companions in the world twice, there is a flag to check if they were drawn after drawing the tiles, or after npcs were drawn.
The problem, is that the game settings menu skips the moment where the flag is reset, so they are never drawn again while the settings menu is open.
2: I have bumped into that bug before. I'll have to investigate that issue. It were happening when I were trying to make a copy of the companion spawn on the world, upon dismissing It on a world where It's town npc didn't spawned.
Edit:. I forgot to tell, but a long time ago, I added a script to check if there aren't companion clones in the world when you load the world. That may solve your problem.
Edit: As a side note, I'm just playing with TerraGuardians currently. At the time of posting, the dim brightness lasted throughout the whole day and night until I rested again, but I currently cannot replicate what happened anymore.
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