Portal Suffocation

I was playing on a Realm with a friend when we went through our nether portal. Sometimes it suffocates us and we lose all our items. I don’t if this is just a Realms issue or a world issue. It happens as often as going through the portal without dying. This started happening right after updating Minecraft Bedrock Edition to 1.13.0. It also stays stuck on the loading screen when I go through the portal.