Any way to fix curse offerings in Blursed/infinite modes?

I had a good run going, but it’s fairly spell focused, so need to avoid the t1 Slow Spells curse.

At floor 517 I get offered it. Then floor 521, then 525, and then **every single floor** up until 677, where I am now, where the two options are Slow Spells and Ghostly monsters every 8 fights. That also sounds run-ending as it would turn every other boss into Inevitable, so I click the “random” curse option.

Which just gives me Slow Spells anyway.

I don’t know whether this is something to do with my version, or if it’s a bug but it’s horrible. Before anyone says I’m out of all other t1 curses, I only have 5 cursed items. I haven’t taken Mortal, Ourboros or Bonezone. I’ve got 20% random modifiers turned on. But every single time it’s giving me Slow Spells.