Hm, that's not a known bug afaik. Can you post a screenshot of your patch?

If you have (or are willing to download) the cyclone externals you could use the "onebang" object and attach that to a metro, or to a delay from its own output.

One simple starting point could be to use randomly chosen notes from a list or a table. For example, you could have a "tonic" table containing of "0 0 0 2 4 4 4 5 7 7 7 9 10 11 12" and read it with a [random 15]. This will give you a weighted random that generates MIDI notes in a major scale, but focusing on the I chord. With another table for pre-dominant and dominant, you could get some function algorithmically.