I have a baby rubber, that used to sit in my windowsill. I moved it to a location with less direct sunlight, and recently noticed the leaves were developing brown spots and falling off. The soil seemed low and it was time to repot it, so I refreshed the soil and upgraded it to a slightly larger pot (the roots had grown) and then moved it back to direct sun, but alas the leaves are still falling. Any ideas? Thoughts on what this could be/what might help?

