Being in Beta means you get access to functions that are not available to the general public in the production app. currently we have access to use and test and reports bugs on features like grouping the cameras and seeing multiple feeds at once, and being able to turn off the infrared LEDs but keeping night vision on. you referenced RSTP Beta. to my knowledge the RSTP feature is being worked on (more than likely in Alpha testing at this point) and could be released to Beta testing in the next update or two for Beta. your profile picture on your post has the tell tale sign of a Beta user (the wrench and gear) as well so you have successfully signed up for the program too. if you have the features I mentioned you do have the Beta app installed.
if you find any odd behavior or have any questions don’t hesitate to mention then in the Beta section of the forums.