I have set two properties in my PCF .
<property name="buttonName" display-name-key="buttonName_key" description-key="buttonName" of-type="SingleLine.Text" usage="bound" required="true" />
<property name="closeTrigger" display-name-key="closeTrigger_key" description-key="closeTrigger" of-type="SingleLine.Text" usage="bound" required="true" />
After 'npm start' command, it displays rightly as I set.

But after I create a solution and import it into my canvas, it only has one property left.

