After the first encounter, on the way down to the Ogre maze, there is a section of the map that just kills you as you go through it. Thankfully, it doesn't occur too deep into the solo-flawless run, but it is absolutely ridiculous. Please fix this ASAP.
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I heard someone say that this does not affect the flawless but I have not tried it since I did not experience it on my run. At least it is early in the dungeon and not somewhere after the totem.