[Elecraft] KX3 #802 Question

[Michael E. Califf,Sr]

After adjusting volume control on a signal, after a certain amount of time, the volume drops a significant amount.
Is this a built in feature of the KX3?? and if so,can it be changed,and if it can,why should I NOT change it???
As an after thought, I did look in the Operating Manual and could not find anything about it. So I came here.

Mecsr  MikeSr  AB7OC