Mat Select placeholder/label disappears when options programatically set to []

[AkshayBarad]

What is the expected behavior?

Placeholder/label should continue to be shown.

What is the current behavior?

Have the select control's value be one amongst the <option>s
Programmatically, remove options; don't touch value
placeholder/label disappears

Example Link

StackBlitz: https://stackblitz.com/edit/angular-mat-select-no-label
Click button "Set Select Options to []"

Which versions of Angular, Material, OS, TypeScript, browsers are affected?

Angular:7.0.3
Material:7.0.2
OS:Mac
TypeScript:3.1.3
Browsers: chrome

Akshay Barad
BitCraft

[angular-automatic-lock-bot]

This issue has been automatically locked due to inactivity.
Please file a new issue if you are encountering a similar or related problem.

Read more about our automatic conversation locking policy.

_{This action has been performed automatically by a bot.}