Odd arrows appear on the exported diagram in jpeg/png

Hi! I've made my diagram in Bizagi Modeler, that looks ok until I try to validate it and export in pic of any format.

In on section spare arrows appear which are not seen during the modelling on jpeg/png. And also there's a mistake when I try to validate the diagram, regarding the connections.

Looks like they are in some invisible mode or in another layer, if there are any levels.

Help to solve, please.