On my break at work atm. But in answer to this question, yes. Space Saints do not spawn in the open world or cribs when selected in gang Customization. The only way to get them to spawn is by calling Saints Backup.Can you test something for me in the gang customization select all Space Saints and let me know if any Space homies spawn? I think it's a regular bug. I have never used/ selected those Space Saints homies until now. I fixed the crashes now its the spawn issue.
And I guess as long as Gat, Pierce, and Shaundi are switched out. You could just replace the Space Saints with generic Saints (2 male and 2 female)