Did you remove the old soil? If not, that is your problem. If I receive a hoya that was potted in anything but an orchid bark mix, I rinse as much of the old mix off as possible (and I can usually get 99% off with minimal root damage) and then pot in my new mix. Gubler mix does not hold moisture for a month, unless it is watered every day, so I doubt it is that.

Yeah, it should have dried out by now. Are you keeping it in a low light room?

Lisa is a very tough plant. I soaked mine well and planted in Gubler. No problem. I would replant. Soak the roots well in a bowl water , that soil she uses is pretty sticky.

No, didn't get very last drop of the oil soil off the roots. I was worried about damaging the roots and didn't want to stress the plant, so I just picked the soil off as best I could and then shook the plant gently. No, it's not in a low light room. West window with no direct sun, but bright light. Southern Calif. desert light!

Okay, update. I took her out of her pot, and sure enough, there was a little of the soil still stuck on the roots, and you're right partycat! It's sticky alright! Lisa is soaking in a bowl of water right now, then I'll repot her again. I was just so afraid I'd hurt the poor plant that has been through shipping and repotting once already. Thanks so much, all of you!