Mine is like this! Loosing leaves then grow!
I've found mine to be quite hardy - even when they've lost leaves they managed to grow again with a bit of care. If you haven't repotted with fresh soil yet I'd start with that. Check the roots as mentioned by @Araceae while repotting. Trim off any dead roots & branches. Don't cut off more than 1/3 of any living branches (those will leak a bit of sap - just trim a little as a time so you don't accidentally cut off too much). Then place it where it gets indirect bright light. Water and keep soil moist but not soggy. I have mine in self-watering pots which helps me and my plants a lot. Best of luck ðĪðŠīð