Almost looks like sunburn to me. Is it against a warm wall? Maybe give it just a bit of afternoon shade?

It is actually outside in front of a window. I wouldn't call it warm (the wall) because it has been in the 90s here in Georgia. But I could definitely see "sunburn" as the issue. Last summer it was outside on a deck (not against a wall), and it was moved to its current location when we had a new deck built, then painted, and it has been next to the house all summer.

I will move it and report back

you can put bamboo fencing between the wall and the plant and this cuts down on the burn. The fencing is cheap at home depot or like stores and is usually 6 foot tall and in a roll of about 25 feet. Anything like a piece of material helps.

I think you're right on about burned. They look scorched, especially in the bottom photo. Otherwise the leaves look healthy; good size and color. Is the window aluminum-framed or have a reflective coating on the glass, or even west-facing?

From what I've heard a seedling might take anywhere from 2-6 years to flower. When the blossom inflo shows up the trunk will branch from that point, and only then will you get multiple tips.