Properly track block update flags (actually fixes #5038)

Spigot-Server-Patches/use-CB-BlockState-implementations-for-captured-block.patch

@@ -45,6 +45,7 @@ index 0000000000000000000000000000000000000000..00000000000000000000000000000000
              if (this.captureBlockStates && !this.capturedBlockStates.containsKey(blockposition)) {
 -                CapturedBlockState blockstate = CapturedBlockState.getBlockState(this, blockposition, i);
 +                CraftBlockState blockstate = (CraftBlockState) world.getBlockAt(blockposition.getX(), blockposition.getY(), blockposition.getZ()).getState(); // Paper - use CB getState to get a suitable snapshot
++                blockstate.setFlag(i); // Paper - set flag
                  this.capturedBlockStates.put(blockposition.immutableCopy(), blockstate);
                  captured = true;
              }