Other side can hear what is playing during a call

[Umaima_B_Dia]

During a call, if something is played on Media Player, the other side can hear it (on headphones) - Xiaomi Note 8 Pro.

It does not happen with their Nokia 6.1 (2018).

Is this a Xiaomi-only feature?

It wasn't possible on my Samsung Note 5 as well.

 

[Rukbat]

It could be crosstalk. It could be loud enough to be picked up by the mic. It's not something to worry about.