Orphan Catalog tasks are being created by users which in fact is creating RITM's
A business rule is created on a custom table which is updating records on this table. These records are associated to Catalog tasks and there is a option to create a Catalog task for end users. As there are orphan catalog tasks being created, a new RITM is being created without any data.
Disable the UI Action to create new catalog tasks and make sure there are no orphan catalog tasks created in the future.