Ya, right after I got the 'witch in the east' quest I saw a person, possibly a witch, stuck in the ice. So I enddiswalled it, and the wall disappeared.
'Damn, killed her.'
So, redid the level a few until I saw her again, 'this time I'll be smart and melt the ice instead of blowing her up: fireball.'
'Hm, maybe I need to shove her out of the ice with pisorf, or shove something else into her?'
Nothing and nada.
'Okay, time to be smart. I know a way to get her out of the ice AND horrifically murder this smarmy human monk! WEYTWUT! Genius! What a dastardly puzzle!'
I'd suggest either removing that block or matching player expectation in some way.