Date/time functions in automation rule don't work with dynamic mathematical functions

Issue Summary

{{issue.created.plusHours(issue.custom_text_field.multiply(2))}}

works in Cloud, but no server equivalent function available.

Summary of our findings:

• The multiply() doesn't exist in server release and we use * for multiplication – Maths
• The following expression works for multiplying the value from a custom field :

  {{#=}}{{issue.custom_text_field}} *2 {{/}}

• Date/Time functions mainly works with static value – Date and Time functions
• The following expression works for adding two hours to the issue creation date/time:

  {{issue.created.plusHours(2)}}

• However, we can't seem to combine both the functions together e.g:

  {{issue.created.plusHours({{#=}}{{issue.custom_text_field}} *2{{/}})}}

  :
  

Steps to Reproduce

1. Create new custom text field and associated to all relevant screens
2. Create new automation rule that multiply the number in custom text field and add to the issue created date/time
3. Create a new issue with some number value in custom text field
4. Check the issue created date/time

Expected Results

Issue created date/time should be updated accordingly

Actual Results

The date/time functions don't work with dynamic mathematical functions

Workaround

N/A