My kid had a similar problem. Under Social Media I had it turned OFF but for the listed social media sites I ALLOWED them individually. Though I ALLOWED her to use Snapchat, she could not use all of Snapchat’s features. So what I did to correct the problem; under Social Media I turned it ON, allowing ALL Social Media sites, then individually turned off the ones I did not want her to use. She was then able to use all of the features of Snapchat. I have no idea why it worked, but it did. Not sure if this is your solution or not, but thought I’d post it anyway. Take care.