Sorting a mat-table with expandable rows causes rows to not expand on first click

#### Bug, feature request, or proposal:

Bug

#### What is the expected behavior?

Sorting the mat-table should not affect the expansion of the rows. The behavior should act as in the example table:
https://stackblitz.com/angular/keapqmllkjp?file=app%2Ftable-expandable-rows-example.ts

#### What is the current behavior?

After clicking on a column with sort capabilities and sorting the table, the expandable rows do not open on first click. Clicking a second time will expand the row.

#### What are the steps to reproduce?

https://stackblitz.com/edit/angular-c8kwxe?file=app%2Ftable-expandable-rows-example.ts
1.) Click on a column-header to sort the table
2.) Click the rows to expand
3.) Once you've clicked on a row and it does not expand, clicking on it again will result in nothing. To get it to expand, you have to click another row and then re-click the row again.

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

#### Is there anything else we should know?

Oddly, if you cycle through all of the sorted states and get the rows to expand through each state, the rows will then behave normally after doing another sort.

Reproduce el problema usando los ejemplos de StackBlitz vinculados, empezando por app/table-expandable-rows-example.ts y las interacciones entre la ordenación de mat-table y las filas expandibles. Compara el comportamiento antes y después de ordenar; se considera terminado cuando las filas se expanden con el primer clic después de cualquier estado de ordenación, igual que en el ejemplo esperado.

Escrito por el modelo de indexación a partir del texto del issue.