3+ old Aeschynanthus twister plant is dying
I have had an Aeschynanthus twister (lipstick) plant for 2.5 years from a greenhouse. It's branches reach down to the floor, at least 4 feet. It flowers several times a year with deep purple/red flowers. It's in a Southwest facing window and has been flourishing, until about a couple of weeks ago...
All of a sudden, the long branches are dying. The leaves are turning yellow, then brown and falling off. They are crispy, not soft. It seems to be dying all over.
I water it the same as I always have, it's location has not ever moved. I did repot it about a year or more ago, but not recently. I fertilize sometimes with the drops you add to the water, but that is only on occasion. HELP! It's the one plant I've never had problems with. I don't see any obvious bug issues. I did find it interesting enough that about 5 months ago a couple of yellow mushrooms grew in it, then died and didn't come back, which I thought odd since I have not ever taken it outside or used dirt not from a bag. But it didn't seem to do anything to the plant at the time.