Spotify starts playing after saying OK Google

[Tasan]

Plan

Premium

Country

Norway

Device

Huawei P20 Pro 

Operating System

Android 9

My Question or Issue

When I am in the car and listening to music, I often want to use Google Assistant. So I pause Spotify and say OK Google. Now the music starts playing again just as the assistant is ready to listen. After finishing a command, the music stops. As soon as the assistant starts listening again, the music starts. Really annoying.