HT Stage 60 - Weird sound on clean channel

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Hello everyone,

Today I went to play my amp and noticed a a weird repetitive sound coming from the clean channel with the voice button pressed down. It disappears when I depress the voice button or switch to OD 1 and 2. Almost sounds like a faint clicking sound. It also disappears when i put the amp in stand by.

Any idea what this could be? I purchased this amp new a month ago, it has about 20 hours of play on it.

I recorded with my iPhone, it can be seen/heard here: https://youtu.be/WnhA8gv-P6c


My apologies it's not the greatest but you can hear it faintly.