Q.My Indoor Azalea Is 1 Year Old Has Been Amazing Bloomed A Few Times Since Last Spring.
I haven’t changed the way I care for it now it is losing all its leaves.
Two photos one with the flower is just a week ago.
Certified GKH Gardening Expert
Some azalea varieties drop lower and inner leaves as part of their natural cycle, and some are deciduous. Check your growing conditions in the article I've linked here.
It's possible your plant has developed root rot. You may want to unpot it, check the roots and trim off any that don't look firm and healthy, and repot it in a slightly larger pot. If you've checked the leaves and stems carefully for pests and it appears fine, you'll probably see it perk back up in the spring with fresh leaves. https://www.gardeningknowhow.com/ornamental/shrubs/azalea/growing-azalea-houseplants.htm