Recent Items Under favorites menu providing access to Tasks even though access revoked via Sandbox

Summary:

Recent Items Under favorites menu providing access to Tasks even though access revoked via Sandbox

We have created a new AR customer Restriction role for Customer record updates. Removed the customer tasks from the existing AR roles(AR manager Custom & AR Specialist Custom). If AR user wants to create or update customers then he needs to raise customer access request and upon approval of the customer access request he/she gets the customer tasks access to create/update customers. But we observed one issue that Recent Items section is capturing the all tasks which are accessed by users recently including the Customer tasks. Capturing the Customer tasks in Recent Items issue is impacting our solution which went