For about two weeks, I have been having a problem with the music randomly turning up to maximum volume. I thought it was a problem with the old iPhone (XS), after several reinstallations of apps and updating the phone to iOS 18 the problem persisted. I replaced the phone and on the iPhone 15 the problem still occurs, but surprisingly at a lower frequency. Normalizing the sound in the app options did not help. Please help or I will have a heart attack. 
I had this issue for months, if not longer. Occasionally the volume would reduce, but more often the volume would crank to the max after certain actions, such as searching for another song or checking another app and then returning to what was playing in Deezer. Could never pin down exactly why, nor could others. Then the issue seems to have gone away a few weeks ago. Sorry to have passed it on to you! ;)
I had this issue for months, if not longer. Occasionally the volume would reduce, but more often the volume would crank to the max after certain actions, such as searching for another song or checking another app and then returning to what was playing in Deezer. Could never pin down exactly why, nor could others. Then the issue seems to have gone away a few weeks ago. Sorry to have passed it on to you! ;)
Thank you for your reply! It's good to know that it's not just my problem, I hope this curse will pass on somewhere soon ;)
I have been having this problem too, desperate for a solution
For about two weeks, I have been having a problem with the music randomly turning up to maximum volume. I thought it was a problem with the old iPhone (XS), after several reinstallations of apps and updating the phone to iOS 18 the problem persisted. I replaced the phone and on the iPhone 15 the problem still occurs, but surprisingly at a lower frequency. Normalizing the sound in the app options did not help. Please help or I will have a heart attack.
I have had the exact same problem on both iOS 17 and iOS 18. It started a few weeks ago, and I am not considering deleting Deezer if the issue does not get resolved asap.
Hello
Unfortunately on the iPhone 12 i have here for test purpose with iOS 18 I never got this issue.
Could it be related to some device connected to the iPhone, like Air pods or Apple watch?
Can you tell us more about this:
It is good to know that this problem occurs more often. In my case:
- the problem appears both on WiFi and from mobile data
- appears on Apple headphones with Lightning and with USB-C, as well as on the JBL Go 3 Bluetooth speaker, on the Bluetooth transmitter in the car
- my device is iPhone 15 with iOS 18.0.1, the problem appeared on XS with iOS 18
- my Deezer version is 10.23.0
- I have reinstalled the app multiple times on both the XS and 15 model
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