This customer is claiming that if the Clarity integration is active, it's ABTasty who is injecting Clarity's tag, and this is detrimental for the website performance.
For instance, this customer is already injecting Clarity's tag from their GTM, and when the Clarity integration is active on ABTasty's side, the tag could be even duplicated and generated undesired consequences.
This is the only integration where ABTasty is injecting other tool's tag when active, as far as I know.