The Editor will hang on Mac if Japanese input is selected on the Mac and the window to select the parent class for a new Blueprint is opened with the All Classes section expanded.

No. This also occurs in 4.16.3.

Steps to Reproduce

This issue only occurs when the input for the Mac is set to Japanese (use Romaji for English).


  1. Create a new Blank Blueprint project.
  2. Select Add New -> Blueprint Class.
  3. Expand the All Classes section at the bottom of the window.
    • The Editor may hang at this point, but probably will not.
  4. Select any parent class and create the new Blueprint.
  5. Select Add New -> Blueprint Class.

The Editor will hang and stop responding.

The window to select a parent class for the new Blueprint is displayed.

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ComponentPlatform - Mac
Affects Versions4.
Target Fix4.19
Fix Commit3723446
Main Commit3739980
Release Commit3813083
CreatedAug 10, 2017
ResolvedOct 27, 2017
UpdatedFeb 7, 2018