Falling off ledge at Darkroot Basin Hydra?

[awalton]

I've played the game a couple times before, before the remaster, and never had this problem. Now, I'm trying to get past the hydra in Darkroot Basin to get to Dusk. I'm level 50, so the fight itself is of course I walk in the park. But TWO TIMES now, I've gotten the thing down to one head, and when I'm trying to get out to the head I'm falling to my death, still too far away from the head to hit it. It's pretty hard to actually tell where the ledge is, so I'm not sure if I'm actually walking off the ledge (which doesn't make much sense since I'm not even close enough to hit that last head), or if there's some glitch which just makes me fall through the ground. Like I said, I don't remember having this problem before, so I'm unsure if this is a new bug or what. Anyone else experienced this, and do you have any thoughts on how to avoid it?

[Alice and Astreus Grimaude]

The ledge was always visible to me in Dark Souls PTD, not sure if that's changed here.

[awalton]

It seems harder to tell, but I couldn't swear to it. And again, I don't think I should even be close to the ledge anyway since I'm not close enough to the head to hit it (walking from the shore, obviously).

[Marsson]

They've added more reflections to the water surface it seems. Just stand at a safe distance with a shield, while switching out to a good bow that you take it down with.