Portal spawned too high to reach

[Krane]

Just had a frustrating bug happen at the end of a great run.

I started fighting the Galley Slave familiar on the beach of Scarlet Coast map. I had him down to half health to which he retreated, I'm unsure if this happens every time or if it was because a calamity happened at the same time.

Anyway I deal with the calamity and head up to the area you have to drop down into to fight the old boss, the endless rift or something like that?
I could see the Galley Slave down there and so used the demonic grenade gun to kill him before dropping down. As I dropped down after he died the portal spawned in the air just out of reach of anything I tried.

I'm not sure how the portal's position is calculated, however if it is relative to the players position then I'm assuming it spawned on me as I was falling down into the pit.

I had to quit to main menu and lose all progress on a great run :(