Steps to reproduce:
1. Open attached project
2. Open Scene "scene"
3. Enter Play mode
4. Try typing something like "nihongo" in the TextArea when switched to either Microsoft IME or Google Japanese Input
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Alternatively, inputting Japanese text anywhere else will result in the same problem of the suggestion field being extremely offset from the input location

Actual result: the suggestion field is offset
Expected result: the suggestion field appears next to the input field

Reproduced with: 5.6.4f1, 2017.1.1f1, 2018.1.0b6