Visualize Plan - internal error...merge a subPlan with itself => will cause errors

Hello,

I am getting the following error when trying to execute a visualize plan in HANA Studio:

[129]: transaction rolled back by an internal error: tried to merge a subPlan with itself => will cause errors!

This only occurs for some queries not all. The queries themselves execute with no problems and the Visualize Plans initially load successfully. The error only appears when I actually execute the plans. Right click green button or F8.

Has anyone seen this error before? Any idea on how to resolve it?

Thank you!