Prefabs created on 2018.2 loose data when dragged to hierarchy

After upgrading from 2018.2 if you open a prefab from the project window, all the scripts show the same data they had on before the upgrade, however if you drag the prefab into the hierarchy they are blanked, the same thing happens if you try to instantiate the prefab from a script.

 

Similar thing reported here, its killing me,
https://forum.unity.com/threads/updating-project-prefabs-from-2018-2-to-2018-3.554302/
Case 1080570
Its bit crazy this made into a public beta

 

I solved it by dragging the prefab into hierarchy them copy the component on the project's prefab, pasting the component values on the hierarchy and finally applying all overrides.

 

looks like a nice temporal workaround, but my prefabs are pretty complex with gazillion of components I'll have to wait fore a fix, but for smaller things this can be solution

 

Hi yes.

Sorry, during weekI try to work as much as I can despite I may report a bug, following up to request requirese time, like hours and that breaks production.

I was testing right now, I was surprised to see QA not being able to reproduce. So I did export again to a package a new asset sthat has plenty of scripts that I've tested to break in the wholy porte project.

And to my surprise, when dragged into the scene, IT DOES PROPERLY reference all the stuff as shown in the project view. I'm going to do some further tests.

What I did now was to from 2018.3 ported project where it breaks, export package and open in 2018.3.


I'll expot same prefab from 2018.2 and import in 2018.3 and see whot happns.

If it works, it may be a project configuration issue that gets glitched on teh 2018.2 to 2018.3 porting. I'll keep you updated.

edit: answered the mail

 

OK, more into this.

I did duplicate 2018.2 project

deleted "library" then I iupgraded to 2018.3 .

Issue remains.

Striping down levels to leav a level that will help me also on another bug I reported and that they seem not be able to reproduce. (probably due to engine version used).

 

@georgeq, currently u can try to change one reference or variable then change back to initial value then save it to update the prefab. It should fix the bug.

 

I'll checkm but I've gazillions of prefabs in the project.
I've just found out that if you duplicate the prefab and you drag the duplicate also works. Probalby same principle as you pointed tho.

 

Duplicating won´t work in complex prefabs with multiple childrens with scripts, actually it seems to mess the things up :\ packing up repro project.

uploading,
looks like it wiill be by monday. or may be late sunday.

QA team has been issued a mail with repro project and testing notes.

Case 1080570

 

Same problem upgrading 2017.x to 2018.3.3f1. I'm trying not to upgrade even further on speculation as this was supposedly fixed after beta. As a workaround, similar to what was reported above, I open a botched prefab (I have lots!) and just disable/enable some script in it to cause it to "refresh" if that makes sense. (the components and values look correct in the prefab but will not play that way) Then the prefab is wholly changed to the new format and it's ok.

I've noticed on occasion that a prefab is "zeroed out" on me and I have to bring it back from source control My best guess is that this happens in run mode (in editor) when a prefab was not manually updated. Unity goes ahead and saves default values (0s, empty arrays, etc) over the prefab.

 

no men, the fix is that you search by type in your project tab, by "prefab" type, select all and check em to "reimport" DO NOT do "reimport all" option, aparently that one wont work.