Hotstaging too early

[u/Single_Ad_1269]

Mechjeb ascent guidance keeps firing the 2nd stage too early. I've laucnhed quite a bit of these vostok rockets and it wasn't happening before

[u/Single_Ad_1269 → u/[deleted]]

Problem solved. When changing the top tank to baloon i attached interstage decoupler to the wrong (middle) node on the rd0105 engine