The speaker keys do not work

Sorry for my bad English.

The speaker turns on and connects with the cell phone.

The problem is that no Jbl key works. For example, it is not possible to increase the volume from the speaker or look for another device by bluetooth (no key responds).

I tried resetting the unit, but I could not solve the problem. I have version 7 installed on the JBL Extreme. The battery is good. It has 3 months of use.

Could you give me some advice?

Thanks in advance!

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