I am not sure if it is just me but it feels like the handle is to be invalidated or not, rather that expired.

It feels like is something that happens by itself whereas invalidation requires an active participation of an actor…

Existing Wording:

and SHOULD apply logic to expire the handle when appropriate (e\.g\., the server might expire the handle when the user session ends)\.

Proposed Wording:

and SHOULD apply logic to invalidate the handle when appropriate (e\.g\., the server might invalidate the handle when the user session ends)\.