Routing - Piping and Tubing

Anyone having no luck at all getting a duct or cable tray route to apply consistently?  I can only get a clean route roughly 10% of the time and I have to do it in a VERY specific way to get the book example to work.  Haven't tried in 17 yet.

In the first example, if I route from top to bottom, SOMETIMES it will apply fillets, and sometimes it dos not.  And 95% of the time, when you go to link the last bit of the route, it will not apply a fillet to add an elbow.  And due to functionality limitations, I cannot add a fillet nor can I drag and drop elbow.  This reminds me of ribbon cable routing where I tell folks to never use it because its broke.

Thanks,

Rod Harper

Solidworks