Custom Angular Components disappearing when built for production

Technical Questions
1

Hi Guys, Im using Angular Material Components in my project. They work fine. If I do a production build of my app and deploy it the components disappear from my UI.

2

ng build:

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image2696×1382 110 KB

3

ng build --configuration production:

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image2698×1480 133 KB

4

In my angular.json I can pin point this down to the optimisation:true flag. If I set this to true my components disappear. If I set this to false my components reappear:

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image1280×684 62 KB

5

Angular Version:
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6

Hi @_CC :wave:

Can you send us a code reproduction?