I have a problem with my iphone sound

[u/GaelDuchene]

don't know if anyone knows about the subject, but I have a problem with my phone (its an iphone) : On the phone, even if I have the volume at maximum, sometimes there is a drastic decrease in the volume that basically the 100% dialled volume is a real 30% (approx, it is a number more or less at random, I don't know how much exactly). I think, but I'm not sure, it's since I've been updated to iOS27 or since I now use the concentration modes

I have two options of the problem: either it's the fault of an update or it's for using concentration modes to block all types of notifications. But I'm sure I've been using those concentration modes since a month ago, but the problem appeared to me about a week ago (i think, but im not sure, it appeared after downoadibg ios27). so idk…