Why am I getting notifications of Pandora casting?

[AC Question]

I haven't installed Pandora on my phone, I haven't used it on my computer, and I changed my password on Pandora in case someone else was using the account and I'm still getting notifications that Pandora is "Casting to Office Home." Any idea why and how I make it stop?

 

[Jadenity]

My wife and I have recently starting to get this exact same notification. We have a Chromecast, and I do have Pandora on my desktop and my Google Pixel XL, but I do not have a network or device called "Office Home". Very strange indeed.