This has been a bug for as long as I can remember but what happens is if you have a blueprint actor that is a child of a parent blueprint actor and it inherits variables, there are times when all child blueprints reset. This seems to occur when editing information inside the Parent blueprint. This does not always happen, and Im not sure what actually causes it, but it is extremely annoying and really sets me back in terms of progress because I have about 50 child blueprints that I have to re add values to.
I have the same problem and puzzled how long this bug remained, It becomes a shame rather…
I also get this bug in 4.11. All my weapons settings resets to default, after change parent class.
4.12 as well. has there been any official response to this yet?
[edit] seems to be addressed here
This is still happening in 4.12.
Can confirm still happening in 4.13. I get it on different classes now though, many of the previously affected ones are fine now.
This is still a bug in 4.13! Epic get on this stuff!
Yep, I can confirm this and it becomes nearly impossible to work with this bug :-/
Had this problems from time to time in my project. Was super-annoying and I head to restore the whole blueprint from my VCS each time.
This is still happening in 4.14 preview.
This is still happening in 4.14.
This is, indeed, still happening in 4.14.
I was at Epic in Bellevue recently and spoke to someone there about it, Mike somebody, said he’d be happy to get some SVN details off me and take a look at repro-ing it in my project. I forgot his surname though and don’t know how to get ahold of him. Maybe someone can give me a list of possible Mikes?
I also just experienced this problem now I have to set multiple values on several blueprint child classes…
This bug is a real problem.
I have have found quite a few reported permutations of it. With many hundreds of child blueprint actors, having to fix their defaults every few days is a real PITA.
Hi everyone. I have moved this post into the ‘Bug Reports’ section so our staff can follow up. This has been previously investigated for the 4.11 release, and the issue was reproduced and logged (Unreal Engine Issues and Bug Tracker (UE-22557)) but it seems the specific reproduction no longer occurred as of the 4.13 release. We will likely need a new reproduction from you, so your help is appreciated.
When it last happened to me, the editor crashed because of a different reason (forget the problem by now) but when I restarted the editor a lot of my child BP values had been reset to default.
EDIT: so it’s become clear that this happens when the editor crashes
Everyone experiencing this problem should vote it’s priority at this link:
I have this problem too in 4.14!
I wanted to add I’ve also had this issue in 14.0 and 14.1. I haven’t upgraded to 14.2 yet. I had a ton of work reset after a crash the other night and all my child blueprintgs had their settings reset to defaults.
Unfortunately this is still happening and the main problem is that it’s pretty hard to reproduce as this issue shows up randomly as far as I can say. I hope this will be investigated soon because this is a VERY serious bug and can destroy a whole game project 
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Hey everyone,
I’ve been looking into this and trying to get a repro in 4.14.3, but without any luck. Any new info, repro steps, and/or test projects would be much appreciated.
I attempted to repro in a new project with the same/similar steps from the JIRA and also in a converted much more complex test bed.