I made some custom blocks. I tested them out in survival mode. but after I obtained a custom block with custom model in survival mode I wasn't able to place and break them anymore. it doesn't seem to happen with blocks that have the normal block model. I was able to place the custom blocks again after giving one block of the same type with the /give command. it only seems to happen in survival mode. I can place the blocks in creative mode without any problems. all of my blocks have custom rotation. exept the block with the normal block model mentioned earlier. I think it is an issue related to that.