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Event Begin Play of Level Blueprint fires twice

While working on my project a bug appeared that I eventually traced to the Level Blueprint's 'Event Begin Play', which had started firing twice for no reason. I began removing things from the project to try and figure out where the problem was, but I removed absolutely everything - all assets, actors, variables and blueprints - leaving only a blank project with this code:

alt text

This had no effect:

alt text

I tried importing the project into the 4.19 preview version, but it still behaves the same. You can download the project files here: Project Files (813kb)

Product Version: UE 4.18
riftris142-bp.png (20.0 kB)
riftris142.zip (832.7 kB)
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asked Feb 10 '18 at 08:18 PM in Bug Reports

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avatar image Chris1832 Feb 11 '18 at 11:00 AM

Are you using steaming or level instances or is this behaviour in the editor with the just the level?

avatar image CrowPath 5 days ago

No streaming or level instances. As stated above, everything in project was removed except for the code shown above. The project files are available to download.

avatar image Sean L ♦♦ STAFF 6 days ago


We've recently made a switch to a new bug reporting method using a more structured form. Please visit the link below for more details and report the issue using the new Bug Submission Form. Feel free to continue to use this thread for community discussion around the issue.



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Hello Duncan,

I got your bug submission, replying here for visibility.

This is... maddening. I'm not seeing this in a new map, so my best guess is that this is a result of the map being created in a previous engine version. (Riftris map is 31kB, and a new blank map with same nodes is 26kB) I moved your map into a blank project and it's still printing twice.

Best workaround would be to migrate assets/nodes/macros to a newly created map.

Thank you for all your work and sharing with Riftris!

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answered Feb 13 '18 at 06:03 PM

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Alex O ♦♦ STAFF
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avatar image CrowPath 5 days ago

Hi Alex,

I figured this would end up being be the case. Since only the map itself was left, it suggested something rather fundamental was off. Mind you, I had been upgrading the same project across most new engine versions since 4.5.

Nothing left but to port it over then. Cheers for having a look anyway.

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