Fireproof Bush

[jordiebear88]

In Keelbreach Bog, one of the two secrets is accessed by

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destroying a bush so that you can throw/fire something onto a tile behind it.

For the longest time, I was unable to figure out how to access this secret because I'd tried destroying the bush the same way I'd been destroying every other bush: fire. But, for some reason, this is the only fireproof bush in the game, and my mage's fireball spell just harmlessly dissipates against it. I didn't want to risk shooting it, for worry that I'd lose the ammo. I might never have found it if my friend hadn't told me that he'd just shot it. I assume that this isn't intended behaviour?

I have a similar issue when firing bolt spells against enemies that are advancing towards me (sometimes the bolt harmlessly dissipates against them, not even doing "0" damage but just showing no numbers at all). I assume this has to do with them leaving a square just as my bolt enters it and essentially walking through it, much like how I can walk along a line of spikes without taking damage if I time it properly, but I assume that's a trickier bug to nail down, whereas fixing one bush would presumably be easy?