There are three methods to get the value of the interface tool:
1. Workflow Constant (i.e. %Question.<Name>%)
2. Action Tool
3. Connect to the question anchor of a tool (i.e. [#1])

All of these three methods work perfectly when normal engine is used:

However, when AMP engine is used, only the [Action Tool] method works:

I am using Alteryx Designer 2020.4 and find that the same issue happens in the version 2020.2 and 2020.3 too.
My questions:
1. Is it a normal behavior of AMP engine?
2. Does it mean I can only use the [Action Tool] method to get the interface tool value? I am currently using 200+ interface tools in my app, and get the values by the [Workflow Constant] method, I don't want to change the method.
Thank you.