Hey @katwesty -- aha, I see! Yes, this is typical for all shapes and diagrams and depends on the relative size of the shape to the zoom. For example, if you increase the size of the event circle, the line links should be visible. This is an intuitive part of Lucidchart, however, I do see how this could cause some issues when working with larger diagrams. If this is something that continues to be a pain point for you, I would recommend posting this in our Product Feedback channel so it gets in front of our Dev Team. We take your feedback seriously and always want to do our best to make sure we provide the best user experience possible!
Again, thanks so much for posting and taking the time to explore this issue with us! 😎