I am having trouble with my korg monologue. The sequencer is going of sync after ca. 1min and it makes it impossible to record a track (or play live

The monologue is currently connected with MIDI in from ableton so the clock is coming from ableton. The sequencer starts when I hit play on ableton. I will try tomorrow with a USB cable instead of the midi but I would prefer to keep the midi.
If anyone has an idea that would be great!
Thank you very much.