Prevent new tag from updating topic currency

At present, adding a new tag to an old topic updates its currency. This seems a bit of an overreaction and it would be useful to be able to disable this functionality. Here is a screenshot example:

In this case, the tag scenarios was added and the topic age automatically resets to zero.

This seems somewhat counterintuitive to me because tagging is more like maintenance than content change? Indeed, as an admin, I quite often add tags to topics, even after some months or longer has passed. In which case, making the affected topics current again seems a bit excessive? TIA. R

Have you tried using the Reset Bump Date option in the topic menu? That can help here.