Timestamp value does not accept string as input

[Clebam]

Describe the Bug

When providing a timestamp formatted string to a parameter that requires Timestamp type, it throws expects a value of type Undef or Timestamp, got String

Expected Behavior

The string should be accepted, then parsed into Timestamp.

Steps to Reproduce

Using the module computermanagementdsc : https://forge.puppet.com/modules/dsc/computermanagementdsc/readme
Using the resource dsc_scheduledtask

  dsc_scheduledtask { "my_task":
    dsc_ensure            => present,
    dsc_enable            => true,
    dsc_taskname          => "my_task",
    dsc_actionexecutable  => 'ping.exe',
    dsc_actionarguments   => "localhost",
    dsc_actionworkingpath => '',
    dsc_scheduletype      => 'daily',
    dsc_starttime         => '2024-06-19T22:00:00',
    dsc_daysinterval      => 1,
  }

(Please note I tried a few different string format, but it always ends up with the same error)

Puppet run output:

Error: Failed to apply catalog: Parameter dsc_starttime failed on Dsc_scheduledtask[my_task]: dsc_scheduledtask.dsc_starttime expects a value of type Undef or Timestamp, got String

Environment

• Version puppet 7.23
• Platform Windows 2022

Additional Context

So I spent some time trying to debug the issue.
I looked at dsc_base_provider.rb source code and the code added with this PR : #57 is working fine as far as I can tell.
The type comparison seems to be done elsewhere, but I can't find it.
I also tried to force timestamp time with Timestamp.new() but received the error

Error: Failed to apply catalog: Parameter dsc_starttime failed on Dsc_scheduledtask[my_task]: dsc_scheduledtask.dsc_starttime expects a value of type Undef or Timestamp, got Type[Timestamp]

The dsc_starttime parameter is defined as this in the module:

dsc_starttime: {
  type: 'Optional[Timestamp]',
  desc: 'The time of day this task should start at - defaults to 12:00 AM. Not valid for AtLogon and AtStartup tasks.',
  mandatory_for_get: false,
  mandatory_for_set: false,
  mof_type: 'DateTime',
  mof_is_embedded: false,
},

I tried to modify with Optional[String] and Variant[Timestamp, String, Undef] but this raised other issues and seems to be a wrong hack.

So far I do not have much more idea on what to do