Using the fresh moves resource pack with "Sync Re-ported" installed will unload all resource packs if fresh moves is enabled.
I am using fresh moves 3.1 and Sync 4.3
Link to Sync:
https://modrinth.com/mod/sync-fabric-reported

Caused by: java.lang.NullPointerException: Cannot read field "y" because "x" is null
at knot//dev.kir.sync.client.model.VoxelModel.lambda$fromModel$1(VoxelModel.java:122)
at java.base/java.util.stream.ForEachOps$ForEachOp$OfRef.accept(ForEachOps.java:183)
at java.base/java.util.Iterator.forEachRemaining(Iterator.java:133)
at java.base/java.util.Spliterators$IteratorSpliterator.forEachRemaining(Spliterators.java:1845)
at java.base/java.util.stream.ReferencePipeline$Head.forEach(ReferencePipeline.java:762)
at java.base/java.util.stream.ReferencePipeline$7$1.accept(ReferencePipeline.java:276)
at knot//it.unimi.dsi.fastutil.objects.ObjectArrayList$Spliterator.forEachRemaining(ObjectArrayList.java:953)
at java.base/java.util.stream.AbstractPipeline.copyInto(AbstractPipeline.java:509)
at java.base/java.util.stream.AbstractPipeline.wrapAndCopyInto(AbstractPipeline.java:499)
at java.base/java.util.stream.StreamSpliterators$WrappingSpliterator.forEachRemaining(StreamSpliterators.java:310)