Can't open chests with stairs or slabs over them, forge-1.10.2-12.18.1.2011

Recently I have installed the recommended version of Forge (1.10.2-12.18.1.2011), and I noticed that suddeny I couldn't open any chest at my map that had slabs or stairs over it, but only when they are at bottom half over the chest. And to be sure, I also checked that in the same map on vanilla, I could open all the same chests with no problems, so it has to do with Forge, because I haven't installed any other mods yet, just Forge on it's own. Hopefully this will be fixed soon, because now I can't play without having to redesign my whole base. Thank you very much for your attention and have a nice day.