NuWave Phono v.55 light random

I love my NuWave Phono Converter. Several great digitized albums made.

My problem is, when I updated to v.55 there are some instances when the light on the face will not shut off after the time I have set (30 seconds). My remedy is the switch the mode, then the light extinguishes. Is this a glitch, or do I just need to keep doing what I’ve been doing to remedy the situation.