What you were expecting to happen, and what actually happened?
I opened the “Spell Effect” dropdown in the Troops filter section and found “Frozen” item. But in all spells there is “Freeze” text. Also “Submerged” must be “Submerge”, “Enchanted” - “Enchant”, “Enraged” - “Enrage”, “Cursed” - “Curse”.
What are the steps to make it happen again?
Just open the dropdown.
Note: other effects are correct: “Stun”, “Web”, “Poison”, “Silence”, “Entangle”