This list is really helpful for a general case but going through most of them are addressed with having the same template with the template locking the parameter. I will definitely keep this list very handy because I was just looking for something like this, So really appreciate this list.
I have a strong feeling it's item 20. Does the creating more defined phasing after an object is placed cause issues like this?
1. The object or category is temporarily hidden CHECKED THIS
2. The object or category is hidden in the view CHECKED THIS
3. The object is being obscured by another element Floor Plans are wide open
4. The object's category or subcategory is hidden in the view
5. The object is outside the view's view range
6. The view's far clip depth is not sufficient to show the object
7. The object resides on a work set that is not loaded within the project
8. The object resides on a work set that is not visible in the view
9. The object resides on a work set that is not loaded in a linked file Not a linked file
10. The object resides on a work set that is not visible in a linked file Not a linked file
11. The object resides within a group (detail model) and it has been excluded from the group Not in a group but didn't think to check something like that thank you
12. The object is part of a design option that is not visible in the view
13. The object is part of a linked file that is not visible in the view Not a linked file
14. The object has one or more of its edges overridden to display as '<Invisible lines>' It is the same object
15. The object is a family and none of its geometry is set to be visible in the view type It is the same object
16. The object is a family and none of its geometry is set to be visible at the view's detail level It is the same object
17. The object is set to not be visible at the category's detail level It is the same object
18. The element has been placed outside the view's crop region (visible extents)
19. The element is an annotation object and does not reside entirely within the annotation crop region It is mechanical equipment family
20. The object's phase settings or the view's phase settings prevent the object from displaying in the view THIS IS WHAT I THINK IT IS BUT I DON'T KNOW HOW SINCE THEY SHOW THE SAME PHASE FILTER AND CURRENT PHASE
21. The view's discipline is prohibiting the visibility of the object
22. The object is affected by a filter applied to the view
23. The object is subject to an element override, set to background color CHECKED THIS
24. The object is subject to a category override, set to background color CHECKED THIS
25. The object style is set to background color shows on one view
26. The object is constrained to a scope boxes that is not visible in the view scope boxes are the same
27. The extents of the object itself don't permit it to be seen Not sure what this one means can you elaborate?
28. The object is a mass, and 'Show Mass' is turned off Not a mass
29. The object's host view has been deleted (area boundaries) Object still shows on one view
30. The view's scale is prohibiting the object's visibility
31. The object is a linked instance with coordinates too great for Revit to handle Not a linked file
32. The user has incorrectly identified the link instance to which the element belongs Not a linked file
33. The object is in a link that is not in its correct position Not a linked file