Hi there, @Petar_Dietrich 
Many thanks for sharing your thoughts with us!
I’ve just tested this functionality several times on my iPhone and couldn’t replicate this issue. If it still persists, please specify:
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the exact model of your devices (iPhone and iPad)
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iOS version for both devices
A video screencast featuring the issue would also be much appreciated 
As for the device-specific options for the sound activation, this is a nice idea and I’ve added it to the Wishlist on your behalf - Option to activate Sounds individually for desktop, tablets and mobile