Hi, everyone. Another FLF question, here.

I have a FLF that is about 1.5 years old. It's done relatively well. At the start of new seasons, it sometimes loses a few leaves, but then seems to settle itself.

This past winter, it has been a little more temperamental than usual. I was watering it with about 1 liter once a week, and I noticed it started to show signs of over-watering. So, I backed off. I've been watering it with 1-2 liters every 2-3 weeks.

I'll wait until I notice that the top half of the tree looks droopy, because it is losing leaves each time it is watered. For the first few times, it lost 1-2 leaves per water, which I wasn't panicking about. For the past month or so, it's been losing 4-5 leaves per watering. I really waited to water this time, but the top looked so droopy. Sure enough, as soon as I watered it, 3-4 leaves fell off the bottom within a couple of days.

The weird thing is, it has sprouted a new branch. It used to have 3 branches with foliage, and now there are 4. Yet, even some of the younger, smaller leaves are dropping.

Some of the leaves that drop are yellow-ish and have some brown fungal-looking veining. Others look totally healthy. It's baffling!

Any advice?

You can see from the bottom that the leaves are all falling off the lower end of the branches, and the bottom is becoming rather bare.

Here is the tree when it was purchased (Sept 2016):