Element render weight should get type cast

@koppie Thank you for reporting this problem. We rely on issue reports like this one to resolve bugs and improve Drupal core.

Is this issue still a problem?

The issue summary states that the problem happens 'sometimes'. But in order to be committed we need to fully understand how this happens so the test and fix are comprehensive.

Since we need more information to move forward with this issue, I am keeping the status at Postponed (maintainer needs more info). If we don't receive additional information to help with the issue, it may be closed after three months.

Thanks!

Steps to reproduce haven't been provided. Therefore, closing. If this is incorrect reopen the issue, by setting the status to 'Active', and add a comment explaining what still needs to be done.

Thanks!