Henriksen Bud 6 question/problem

I bought a used Bud 6 and love it but when I use the headphone out, I get a gated sound. Somewhere in the circuit I can hear a gate or pass happening.
Hard attack keeps the tone consistent but if I let up I can hear a drop after a second or so. Any idea what’s happening? Thanks in advance.

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u/Jwoo566 — 1 month ago