Function Event Schedule - Can't use conditional for "Enabled" property

[muzehyun]

Description:
I have created Schedule event for a function.
And I wanted to enable it conditionally
Whatever conditional I have used, it's always enabled.
(I already verified with inverted true/false - conditional might wrong - still always enabled)
I have confirmed through cloudwatch log too.
If I use Enabled: false directly, it works well.

• similar issue - Event source types - Schedule #1142

Conditions:
  IsDev:
    Fn::Equals:
      - Ref: Stage
      - dev

SomeFunction:
  Type: AWS::Serverless::Function
  Properties:
    ...
    Events:
      warming:
        Type: Schedule
        Properties:
          Enabled:
            Fn::If:
              - IsDev
              - false
              - true
          Schedule: "cron(* * * * ? *)"

Observed result:

Expected result:
Properly "Disabled" based on conditional.

[jfuss]

This is a duplicate of #1329

Closing this one in favor of that since #1329 has a bunch of comments.