mob spawn rate is higher in realms

 I subscribed to play on a realms plus server with my nintendo switch. The game has made me believe that mob spawning in realms does not behave the same way as it does in normal worlds. It seems that mob spawning is more abundant and sometimes they even spawn on top of each other, which, I know is possible, but seems much more frequent in my realm. 
 To reproduce these results, I can load into my realm server and observe the mob spawn rate versus downloading the same world and loading it normally (not on a realms server). 
The mobs spawn much more abundantly (seems to be double) in a realms server versus when I download the world and just play on my own. 
 Of course, I have no idea about the technical logistics mojang has in place nor how they work, but I am thinking the cause of this may be the world has multiple instances on your servers and my console causing the game to think that it needs mobs for multiple worlds that don't actually exist. If you can, refer to ticket MCPE-134457, they seem to be having the same issue although playing on a mobile device. A solution that was offered was to change the game's simulation distance to 4 chunks, but I believe this is default for realms.
 I've posted a picture with four creepers and one zombie spawning in one area, there is also a video with five zombies, two skeletons and two endermen spawning in one area, and another video of us running into around 10 zombies, a skeleton and a spider.

Thank you for your time and consideration. I have been a fan of your beautiful game for years and hope to help make it better.