Doors broke down by open them. Can't build them again.

When I open doors at my server realm the doors get broken by just clicking on them. And I cant put the door back in place. It just get slightly visible and then disappears and it won't be replaced like it was before. This bug happened to four doors on my server in different houses. This happened 14.10.2017 and this bug/error is still going on. Please help me fix this problem. Minecraft PE (Samsung Galaxy s8+ Android 7.0)