Boolean split breaks model

I’ve tried to make this work with boolean split, split, and trim. The issue is that these commands break my model for some reason. Before the command the model is closed and after the command the model is closed but appears to be open in all the viewports. Screenshots attached for reference:

Before command:

After command:

Hello- please post a file with the inputs to the Boolean operation - or send to tech@mcneel.com with a link back to this topic in your comments.

-Pascal

Hi Chris - the problem is likely here - there are coincident faces and splitting is not happy to decide what to do here

image

If the plug thing fit fully inside the long tube without that coincidence, it should work.
-Pascal

Oh! I didn’t realize I was also selecting the plug when trying this split. Thank you Pascal!