Playing the first card too quickly causes a fatal exception

[jayktaylor]

Describe the bug
It appears that playing the first card in a new round too quickly results in a fatal exception which crashes the app.

To Reproduce
Steps to reproduce the behavior:

1. Click 'Start game'
2. Quickly drag the card to the timeline
3. When game over, hit 'Play again' and repeat step 2. If quick enough, the app will crash.

Expected behavior
The app won't crash.

Screenshots

Additional context
The exception appears to be here in board.tsx: https://github.com/tom-james-watson/wikitrivia/blob/master/components/board.tsx#L113

item is undefined when this error is thrown. I've tried to do a little bit of debugging, but it seems like a weird race condition that I can't put my finger on.

[iggalili]

keeps happening for me too