CME startup crash

[ukmcplyr]

Hit the following CME on an in-dev modpack with forge-1.19.2-43.2.14, create-0.5.1.b and create_crystal_clear-0.2.1:

[05:36:53] [modloading-worker-0/ERROR]: Failed to create mod instance. ModID: create_crystal_clear, class com.cyvack.create_crystal_clear.CrystalClear
java.lang.reflect.InvocationTargetException: null
[...]
Caused by: java.lang.ExceptionInInitializerError
        at com.cyvack.create_crystal_clear.CrystalClear.<init>(CrystalClear.java:30) ~[create_crystal_clear-0.2.1-1.19.2.jar%23566!/:1.0]
        ... 14 more
Caused by: java.util.ConcurrentModificationException
        at java.util.HashMap.computeIfAbsent(HashMap.java:1221) ~[?:?]
        at com.jozufozu.flywheel.core.StitchedSprite.<init>(StitchedSprite.java:24) ~[flywheel-forge-1.19.2-0.6.8.a-14.jar%23901!/:0.6.8.a-14]
        at com.jozufozu.flywheel.core.StitchedSprite.<init>(StitchedSprite.java:28) ~[flywheel-forge-1.19.2-0.6.8.a-14.jar%23901!/:0.6.8.a-14]
        at com.simibubi.create.foundation.block.render.SpriteShiftEntry.set(SpriteShiftEntry.java:13) ~[create-1.19.2-0.5.1.b.jar%23563!/:0.5.1.b]
        at com.simibubi.create.foundation.block.connected.CTSpriteShifter.lambda$getCT$0(CTSpriteShifter.java:22) ~[create-1.19.2-0.5.1.b.jar%23563!/:0.5.1.b]
        at net.minecraftforge.fml.DistExecutor.unsafeRunWhenOn(DistExecutor.java:111) ~[fmlcore-1.19.2-43.2.14.jar%23854!/:?]
        at com.simibubi.create.foundation.block.connected.CTSpriteShifter.getCT(CTSpriteShifter.java:22) ~[create-1.19.2-0.5.1.b.jar%23563!/:0.5.1.b]
        at com.cyvack.create_crystal_clear.index.CCSpriteShifts.getCT(CCSpriteShifts.java:28) ~[create_crystal_clear-0.2.1-1.19.2.jar%23566!/:1.0]
[...]

Hopefully I've found the right culprit but please tell me to shove off in another create-ward direction if wrong.

Full latest.log here and mod list here.

Unsure how reproceable it is, have only hit this particular CME once in approx. 70 boots.