My saplings are not growing. I've used this tree farm build in the past and it's always worked without fail, every time, until now.
The glass on the roof is Greenhouse glass from Actually Additions, and the clear glass on the sides is from Extra Utilities 2. Has the game's code changed at all for 1.12.2? Why are my trees not growing?
Remember, this tree farm has always worked for me in the past, every time. This is the very first time I'm having this issue.
Edit: Testing this same build in a flat test world and the problem is still happening.