Colour Bug - Drag and Drop Exercise

We are experiencing issues with the Drag and Drop exercise function. The problem is that correct results are shown in a purple colour. It happens when the items are placed incorrectly in the first try and then placed correctly in the second try.  Example - see attached. 

Platform: Moodle
Device: Desktop
H5P: Drag and Drop | H5P

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Summary: 
Drag and Drop Bug
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