We have a 2012 31-RETS with the same type leak on the left of the shower, the panel facing the sink cabinet. Water looked like it was coming from under the glass frame where it meet the plastic base. I added a bead of silicone but it will still leak if the shower head is directed against the left glass panel, so we are just careful not to aim it that direction. I may try adding some more silicone to the sides but for now I am not going to worry about it.
2014 Cedar Creek 34 RLSA-7
2015 Chevy Silverado 3500HD LTZ SRW