First of all all my love to you and your mod! Been playing with it for the past 1-2 years.
With Forge 1895 and Roguelike 1.5.0 I noticed some of the new traps facing outside of the corridors (if there was a cave that way). Thought I should mention it.

update: Im guessing the way its set up atm that when the dispenser is placed you check for air blocks next to it and its going to face the way there is one and if there's an other corridor or cave that way it will have a chance to face the wrong direction. if its possible you might want to check for the other side of the corridors blockmaterial(i know that's a lots of possibilities due to themes) or generate a block behind it if that's(probably) easier. <3