This is also happening on my Realms server (bedrock). This only occurred after the most recent update.
One of my players has already suffocated to death twice. I'm also sustaining damage whenever I traverse a portal. Not enough for me to die in one instant, but a few hearts of sustained heart damage. Pretty immersion breaking.
I have a video but your limit of 10MB prevents my upload of it.
Added note: said friend has mentioned this only happens during the loading / Building Terrain screen. Given that he's playing on an older console, there is a higher risk of death due to longer load time.