Developer Notes

This issue was marked as a duplicate of UE-48194, which is in turn a duplicate of UE-47843. Please refer to those bug reports for further information.


Opening a blueprint that has an input event in it cause the blueprint to become dirtied and require compiling.

Regression?: Yes
This did not occur in 4.16.3-3561208+++UE4+Release-4.16

Versions tested:
4.16.3-3561208+++UE4+Release-4.16 - Did not occur
4.17.0-3573198+++UE4+Release-4.17 - Occurred
4.18.0-3575318+++UE4+Main - Occurred

Steps to Reproduce
  1. Create a new project
  2. Add an input event in Project Settings > Input
  3. Create a new actor blueprint
  4. Add the previously created input event to the event graph
  5. Compile/save the blueprint
  6. Close and reopen the project
  7. Open the blueprint
    Result: The blueprint is dirtied (requires saving) and requires compiling
    Expected: The blueprint is not dirtied and is compiled

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ComponentGameplay - Blueprint Editor
Affects Versions4.174.18
CreatedAug 10, 2017
ResolvedAug 10, 2017
UpdatedApr 27, 2018