Cubase arranger is not stable when selecting parts of the arrangement to play

Anyone else having an issue with this?

It’s as if it’s something to do with buffer or cache or RAM. I don’t know. All I know is, the arrangement editor is not reliable when I want to jump around sections of the song. It will continue playing the previous blocks while eating into the new block.

On the right side, where the blocks are, THIS is very stable and works rock solid. But when you move them over to the left side, it’s buggy on playback.

When you play the arrangement from the beginning to end, it’s fine. It’s just when you want to jump around it.