Hmmmm, so I printed with the MakerJuice Castable resin, with the build platform set -0.4mn and I got 2 of the 4 parts to come out. Even though the rafts from the previous attempt with the Formlabs gray resin was between 2.1mm and 2.2mm thick, after lowering the platform 0.2mm from that attempt, the rafts that came out where only 1.6mm thick. Seems quite suspicious that it is exactly 0.4mm thinner than it should be and the platform was set to -0.4mm.
One of the rafts failed doing the last (Suction Cup) layers of the raft (front right), so I am wondering if the 2.7.1 update is a large part of why it was working better before?
Anyways, I think for the next attempt, I will revert to 2.7.0, use a brand new build plate, and set the build platform back to 0 since the rafts are 0.4mm thin. Other suggestions/feedback appreciated!