Thank you for helping us to improve the Unreal Engine!
We request that all bug reports please be submitted to the UE4 AnswerHub in the Bug Reports section. If you have multiple issues to report then please make a separate post for each. This will allow Epic to track each issue more easily.
HOW TO REPORT BUGS ON THE ANSWERHUB
Please remember to always Search the AnswerHub first, to see if your issue has already been reported.
If your issue has not been previously reported, then please report all on the UE4 AnswerHub. To do so, click on Post a Question. Set the ‘Section’ to Bug Reports.
Please make a new report for each separate bug, and use the following format whenever you are able:
Branch: Is this a ‘Binary’ build from the Unreal Launcher, or a ‘Source’ build from GitHub?
Build version: The version number of the Unreal Engine which you are currently experiencing the issue on. For example: 4.0.1 - 2027741 (This is found in the editor under Help > About Unreal Editor)
Detailed description of the issue: Please remember to include all potentially relevant information, such as whether you have confirmed that the issue is occurring with default settings, or if it is only with your custom project. If you have experienced a crash, then the Crash Reporter window will appear and prompt you to submit the crash information. Please submit the information, but also please use the Copy to Clipboard function, and paste the results in your AnswerHub post. This will allow our support staff to quickly track down the crash details.
Screenshots/Link to video: We encourage you to include screenshots or link to videos whenever they may prove helpful in understanding the issue.
example: Open an Actor Blueprint
example: Add an ‘Event Begin Play’ node to the EventGraph
example: Connect the above to a ‘Print String’ node
Let us know, does the issue occur 100% of the time for you with these steps? Or does it happen less frequently?
System Specs: (When needed - generally for rendering or performance issues) Tell us your operating system, your CPU, RAM, Graphics Card, and anything else which may be of importance. Feel free to attach your DXDIAG.
Attachments: If your bug is easily reproduced with a specific content asset, then we welcome you to upload a simple test FBX or .uasset which we can test with. If you are experiencing a crash, then please provide us with the .LOG and .DMP files that are generated during the crash. Go to this link for details on locating different types of log files: https://wiki.unrealengine.com/Locating_Project_Logs
Once again, thank you very much for your help in reporting these issues!