High volume cut out?

  • Once again, very new to the amp and couldn't find an answer in the forum.

    While testing/experimenting with it, we dialed in a huge high gain, ballsy patch (Engl). It sounds huge, amazing. This little amp is very loud for its size, so we cranked it out of curiosity.

    As we got it close to the max, maybe 8/10, we noticed it did a volume fade out/cut out. Almost like it was going to clip, so it faded back. It feels like we were getting close to hurting it. It repeated this effect several times as we adjusted the master up and down, just a sudden drop out, then the sound came back as we turned it back down. It wasn't the gate.

    Is this a bug or self-protective feature?