Realms won't load up multiple resource and behavior packs and add a feature on realms for expirmental. (on Bedrock)

Realms will allow certain of addons I tried activate some resource pack and behavior  pack it loads and and it keeps showing the where exporting and intializing and it loops sometimes and eventually it crashes then I do it again the same happens 

And you can only have 1 behavior/resource and a selected amount can only work