Description

When using MS-IME as Japanese input method, scrolling out the text field out side the view causes bIsComposing to be set false - this state causes instability of the editor.

Crash happened with Windows7/Windows10, 4.14 and 4.15.

Steps to Reproduce

0. Make sure you are using MS-IME as Japanese input.
1. Create a default level if there is none
2. Tweak the layout to make the details panel height shorter
3. Select PlayerStart
4. Start inputting some Japanese in Player Start Tag and display the candidate list
5. While the candidate list is displayed, scroll the detail panel to make the Player Start Tag outside the view
6. (If you have attached VS to the editor process, you'll see check for bIsComposing is failing)
7. In 4.14, step 5 crashes the editor. In 4.15, try to open the help menu - the editor crashes with Assertion failed: bIsComposing [Link Removed]

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Fixed
ComponentUE - Editor - UI Systems - Localization
Affects Versions4.144.15
Target Fix4.16
Fix Commit3398488
Main Commit3427032
Release Commit3398488
CreatedApr 18, 2017
ResolvedApr 18, 2017
UpdatedJul 5, 2017
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