Different tp!id and task id in Tempo

As other practitioner suggested use getprocesstaskid, it's in this shared component: forum.appian.com/.../summary

Thanks but it behaves somehow weird. When i call this function from expression rule it works perfectly and returns task ID:
rule inputs:
processId = 536871711 (got it from process model)
taskName= "Review"
expression:
getprocesstaskid(
processId: ri!processId,
taskName: ri!taskName,
isDesignTimeName: false
)
returns 536882036

But problem is when i want to call this rule from process model in escallations when i am building alert message. This is what i put into email subject expression:
="Task URL: xxxxxxxxx.appiancloud.com/.../"&rule!FI_getTaskId(
processId: pp!id,
taskName: tp!display
)

Received email subject looks like this:
Task URL: xxxxxxxxx.appiancloud.com/.../

TaskId is missing at the end. Do you know what am i doing wrong?
Thank again

Think of escalation is of it's own task/node, outside to context of the current task. When you say tp!display on the escalation it return the name of escalation. For the same reason you are not able to use tp!id on the escalation. Use the task name "Review" or similar as how you were using for testing the rule!FI_getTaskId.

For debugging you can send out alert/email from the escalation with tp!display, tp!id to see the runtime values

Think of escalation is of it's own task/node, outside to context of the current task. When you say tp!display on the escalation it return the name of escalation. For the same reason you are not able to use tp!id on the escalation. Use the task name "Review" or similar as how you were using for testing the rule!FI_getTaskId.

For debugging you can send out alert/email from the escalation with tp!display, tp!id to see the runtime values