Failed Colony #2

https://preview.redd.it/m5b1xeildczf1.png?width=1920&format=png&auto=webp&s=ea390f2eccef25f5ed1b0be15c64c3a3a5dc939e

Ok so this is the second time that this has happened. Claimed a system, dropped the beacon, went to where the colony ship would be and again, no show! What is going on? Is it the type of planet that's set as primary? Are gas giants with rings no good? Do I need to set them as an Asteroid base? If so, why does the option never appear as a primary port option? Am I doing something wrong???