Hello & welcome..!
While I don't readily know Answer, a 'translation' to english from Russian
from google/translate is provided for any helpers ~ to get an idea of Q:
"...What should I do if during a conversation the music from the playlist automatically
turns on and the conversation is interrupted?
..I have an iPhone 6 plus. It is the latest version. Until 11.2.3 has not yet been updated.
I tried to restart the phone, but still it did not help..."
In any event...