My roku is hacked it started playing different apps also in the search they typed I will get you.
I think someone has gotten into your wireless network. If it were me I change the WIFI password. I use this:
https://www.expressvpn.com/password-generator
to generate a very strong random password. Copy it to a text file and save it. Change the password on both the 2,4 and 5 GHZ bands. Changing the SSID also is a good idea.