I get these messages endlessly every tick in the logs window. Is that okay?

System.NullReferenceException: Object reference not set to an instance of an object
at ShellTooth.ScenPart_EnableForaging.Tick () [0x00037] in <b09876294f1547baa40b32e6552890d6>:0
at (wrapper dynamic-method) RimWorld.Scenario.RimWorld.Scenario.TickScenario_Patch1(RimWorld.Scenario)
at (wrapper dynamic-method) Verse.TickManager.Verse.TickManager.DoSingleTick_Patch6(Verse.TickManager)
UnityEngine.StackTraceUtility:ExtractStackTrace ()
(wrapper dynamic-method) Verse.Log:Verse.Log.Error_Patch1 (string)
(wrapper dynamic-method) Verse.TickManager:Verse.TickManager.DoSingleTick_Patch6 (Verse.TickManager)
Verse.TickManager:TickManagerUpdate ()
(wrapper dynamic-method) Verse.Game:Verse.Game.UpdatePlay_Patch3 (Verse.Game)
Verse.Root_Play:Update ()

While Yinglet meditation lets them use anima trees as a focus object, it doesn't seem to count as Natural meditation for purposes of growing anima grass (unsure if it lets them rank up with the tree as normal should someone else meditate and grow grass there). Maybe just give younglet backstories the Natural focus type?

just found the weirdest incompatibility. when this mod is used alongside "quality of building" (the mod that adds textures for every quality), shelltooth spams the log every tick with an error and lags out the game. one of those "System.NullReferenceException: Object reference not set to an instance of an object"

can be replicated with the minimum of these mods and dlc:
Core
Royalty
Ideology
Biotech
Humanoid Alien Races
Yinglets!
Quality of Building

removing either yinglets or quality of building fixes it. very odd. i can provide a log if asked i just don't want to clog the comments lol

Every time I load a save, any yinglet that was born at my colony resets to their younglet stats. I wish I could provide more info for you, but I don't know how. Other than this problem I love this mod.

There appears to be some issues with yinglets of non-baseliner xenotypes. I got some pigskin yinglets from a refugee quest and they are invisible. Also, some yinglet corpses seem to break the entity render layer. I can provide more info if needed

Edit: After reloading my save, the pigskin yinglets became visible again, but the yttakin yinglet started breaking the entity layer. Important note: The entity layer only breaks when it has to render them. It works fine if the problem yinglet is not on screen. This applies to the corpses I mentioned above as well.

Edit 2: Apparently, even baseliner yinglets can become an issue. If there is a pattern, I don't see it.

I have an issue related to Shield Belts

Human Pawns cannot wear them yet Yinglets can

Tested it with only the Yinglets mod enabled and its dependency. Unsubbed and Resubbed to the mod

The Cricket armor "Jump" ability soft locks the game for me

All of these are noted! Fixes may take a while as I'm in the process of having to find a new place to live.