The issue you’re describing seems to be a previously discovered bug in an older build of Axure RP 10 that we have since released a fix for with build 3851.
As a first troubleshooting step, if running an older build of Axure RP 10, please update to the most recent build (10.0.0.3897). You can complete this update by opening Axure RP and following the menu path: “Help > Check for Updates”, or you can download it from axure.com/release-history.
Please also try republishing the prototype that you are seeing this issue to see if that helps as well.
If you are still seeing issues with those connector arrows, can you attach the .rp file so we can investigate? If you prefer, feel free to email us and send any files at email@example.com.