Proposed resolution (approved by CWG 2024-03-01):

Change in 7.5.5.2 [expr.prim.id.unqual] paragraph 3 as follows:

... [Note 4: If the entity is a template parameter object for a template parameter of type T (13.2 [temp.param]), the type of the expression is const T. —end note] In all other cases, the type of the expression is the type of the entity.