Production Impact: Action Plans v4.3.0 sending notifications despite reminders being disabled

[FarukNeo]

Describe the bug
Action Plans (Salesforce Labs) keeps sending task notifications to users even after user-level task notifications are turned off and reminders on Action Plan tasks are disabled. Notifications occur both when an Action Plan is created from a template and at the (disabled) reminder time.

To Reproduce

Install Action Plans (Salesforce Labs) v4.3.0 in a Production org.
Create an Action Plan Template with tasks.
Disable/uncheck reminders for tasks in the template.
Turn off user-level task/assignment notifications in User Settings for affected users.
Create an Action Plan from the template and assign tasks.
Observe notifications at plan/template creation and again around the intended reminder time.
Expected behavior
No notifications should be sent when task reminders are disabled and user-level task notifications are turned off.

Screenshots
We can share sample notification messages and Action Plan Template/task screenshots if helpful.

Environment (please complete the following information):

OS: [e.g., Windows / macOS]
Browser: [e.g., Chrome / Safari]
Action Plans Version: v4.3.0 (See Setup > Installed Packages)
Salesforce UI
Classic
Lightning Experience
Org Edition
Personal
Contact Manager
Professional
Enterprise
Unlimited
Developer
Org/Env: Production/Enterprise

Additional context

We have ruled out other org automations (Workflow/Process/Flow) as the source.
Notification timing: when a template/plan is created and at reminder time (even though reminders are disabled).
Questions:
Does the package include any built-in feature, Flow, or Apex job that triggers these notifications? If so, what is it called and how can we disable it (setting, metadata, template flag, etc.)?
Are there any known issues or patches related to this behavior?
What are your recommended short-term steps to silence all notifications?
We can provide a sample notification, template screenshots, Apex Jobs, Flow Interviews, or a user debug log if needed.