Some apps not loading

Some of my apps (Pandora, Pokémon go, and Tumblr) are not loading on my Samsung Galaxy S7 when I am on my home wifi. Other apps and roku work just fine. I can load those apps when not on wifi. I tried airplane mode, WiFi on, and it didn't work. I've cleared the cache on these apps, restarted my router, my phone, etc. Nothing works. When I load the app on data and turn it to my home wifi, the apps work for a little bit (few minutes to an hour).
I really don't know what else to do. I'm...

Some apps not loading

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