Noise like delay with full feedback

  • Hi guys

    I have Kemper stage and software is newest beta version

    I was recording some swell sound with 100% wet delay and reverb

    And it starts making noise like full feedback delay

    Output led was red

    It keeps going even if volume pedal was 0, guitar volume knobs 0, turn on tuner in kemper with mute signal..

    So I turned down mix ratio of reverb and delay

    Then that noise disappeared


    It wasn’t first time to play swell sound with 100%wet

    I did before at live show and that was fine


    I wanna know why this happened ;(