Known issueFixUpdated · 7 replies on Steam
The Binding of Isaac: Rebirth: Jacob+Esau Beast Bug? (Workarounds)
Short answer
No confirmed fix yet. Players suggest: Known bug, hopefully fixed in the next update, along with some other issues with that attack in particular.
The problem
This was very strange. I was doing just fine in the Beast fight up until they used their fire ring attack. I usually have 0 problem with this but for some reason one brother just got sucked in at lighting speed inside their mouth and I couldn't do anything at all. What gives? Shouldn't both characters be at equal speed? They were both next to each other as well. I'm just salty about this because…
What players suggest
Known bug, hopefully fixed in the next update, along with some other issues with that attack in particular.
I just tried again and defeated the Beast with a much better run, but it's still good to know it'll be fixed soon.
not fixed after two years, I HATE YOU EDMUND
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Source: original Steam Community discussion. Quotes are shortened; all credit goes to the posters.