So freeze basically has 2 defects Atm.
1st is that it’s unable to freeze frozen tower after a certain amount of time.
2nd is (and this is similar to pathox’s passive not applying on the turn) Gunnar has to be completely facing the island before the freeze will apply. Else it will:
a) not apply at all
b) give the visual effect of applying (towers will have the ice around them) but they aren’t actually frozen.
The work around is wait till towers fire to tap on the towers since they freeze on the tap and not when the shot lands. This will also freeze the shot in the air.
Example A: https://youtu.be/vDz_vCDQcJw
And B: https://youtu.be/_RPABH_ZBP8