Backport fix for MC-296337 (Fixes #12617) (#12619)

paper-server/patches/sources/net/minecraft/world/entity/Entity.java.patch

@@ -135,7 +135,7 @@
      @Nullable
      private BlockState inBlockState = null;
      private final List<List<Entity.Movement>> movementThisTick = new ObjectArrayList<>();
-@@ -259,6 +_,41 @@
+@@ -259,6 +_,45 @@
      private final LongSet visitedBlocks = new LongOpenHashSet();
      private final InsideBlockEffectApplier.StepBasedCollector insideEffectCollector = new InsideBlockEffectApplier.StepBasedCollector();
      private CustomData customData = CustomData.EMPTY;
@@ -173,6 +173,10 @@
 +    public final AABB getBoundingBoxAt(double x, double y, double z) {
 +        return this.dimensions.makeBoundingBox(x, y, z);
 +    }
++    // MC-296337
++    protected void clearMovementsThisTick() {
++        this.movementThisTick.clear();
++    }
 +    // Paper end
  
      public Entity(EntityType<?> entityType, Level level) {

paper-server/patches/sources/net/minecraft/world/entity/vehicle/AbstractMinecart.java.patch

@@ -96,6 +96,14 @@
          }
      }
  
+@@ -386,6 +_,7 @@
+     public void applyEffectsFromBlocks() {
+         if (!useExperimentalMovement(this.level())) {
+             this.applyEffectsFromBlocks(this.position(), this.position());
++            this.clearMovementsThisTick(); // Paper - MC-296337
+         } else {
+             super.applyEffectsFromBlocks();
+         }
 @@ -457,6 +_,15 @@
          this.setDisplayOffset(compound.getIntOr("DisplayOffset", this.getDefaultDisplayOffset()));
          this.flipped = compound.getBooleanOr("FlippedRotation", false);