Calypso mode: sometimes 1 line break is inserted on each "ENTER" keystroke instead of 2

[mzorz]

Expected

In Calypso mode, 2 line breaks per "Enter" keystroke should be inserted.

Observed

Sometimes, hitting "Enter" on the soft keyboard inserts 1 line break instead of 2.

Reproduced

1. start a new draft with Calypso Mode (i.e. WPAndroid)
2. type whatever and hit enter
3. repeat step 2 many times, and observe sometimes 1 line break is inserted instead of 2.

Tested

[Google Pixel] on [Android 8.0] with [latest]