Lost arrows in ports for flow properties in SysML

[mse]

I haven't made any changes to the model itself (a SysML IBD). However, after changing a few settings in appearance such as colors, I noticed that the bidirectional arrow in the port is now missing. The port now looks like a plain port. How can I restore this? I tried selecting all and then selecting "LAYOUT > Diagram > Appearance > reset local element colors ... However that did not have any effect. my interfaceBlock hasn't changed either, and it has inout flowProperties.

[mse]

I found the answer. I had removed the checkmark on the box "show shape scripts" under diagram properties. This removed the arrows from the ports. Enabling the "show shape scripts" fixed the issue.