Seems like the "reroll on duplicate scepters" doesn't work with Benthic Bloom. Just had a run where my Blooms gave me 6 ancient scepters in a single stage
Not sure if it was a result of the same bug or a different one, but later on that stage I picked up an ancient scepter from a chest (the first non-bloom one I'd gotten) and that one did not reroll either
Died later that stage unfortunately so I couldn't test to see if picking up a second one would reroll properly or not
https://discord.com/channels/891016030560854059/893955420878671912/1009482963609731152