Volume gets suddenly loud

[Pvuoti]

Hi! We have a two android phones, chromecast and a family account. We use separate users. Sometimes middle of the listening there is voice guidance saying someone else is listening spotify with this account and volume gets suddenly really loud. At this point another android phone is givin a notice that its listening a song. How come that happends and is there anything we could do to avoid the situation? Thaks for the answers.