Combined Task Email showing 'Null' instead of tasks names

Summary:

We noticed in the past month that our emails to employees for combined tasks are showing 'Null' as the task name, instead of the actual task names. We tested this in 3 different instances and it's showing the same in all 3. We have not edited the Alert and we know that it previously was working as intended. Any help would be appreciated.

Alert Name: Task Assigned Combined Notification

Here is the template and the message:

And here is what the emails look like when they are sent out, notice the 'null' under the task lists.

Content (required):

We noticed in the past month that our emails to employees for combined tasks are showing 'Null' as the task name, instead of the actual task names. We tested this in 3 different instances and it's showing the same in all 3. We have not edited the Alert and we know that it previously was working as intended. Any help would be appreciated.