Example one:

Wielding 2 pistols, both with fling shot.
Unequip left hand pistol and fling remains greyed out until you zone.

Unequip left hand pistol, fling greys out. Re-equip left hand pistol and fling becomes available.


Example two:

Click surgery clinic to install Comp Lit implant upgrade.
Comp Lit increase does not show until zoning.

Works the same with all implants (swapping and fresh install).