looks like you have both (converging and diverging) gateways that have more incoming and outgoing connections and then the system cannot determine their type. Best is to always stick to only one type and if you need a loop then place another diverging gateway after converging one.
Ah, thanks, I get it now.
I did have a gateway with two entry points and two exits.
I added a converging gateway (two entry points, one exit) followed by a a diverging gateway (one entry, two exits) and the problem goes away.