Prevent BEs that get removed by other mods in-between being loaded an…

…d the end of the tick from crashing the game.

src/main/java/appeng/hooks/ticking/ServerBlockEntityRepo.java

@@ -40,7 +40,10 @@
 class ServerBlockEntityRepo {
     record FirstTickInfo<T extends BlockEntity>(T blockEntity, Consumer<? super T> initFunction) {
         void callInit() {
-            initFunction.accept(blockEntity);
+            // It's possible the BE has already been removed after it was loaded. We skip initialization in that case.
+            if (!blockEntity.isRemoved()) {
+                initFunction.accept(blockEntity);
+            }
         }
     }