Miniature cymbidium question

[BD11]

Hi everyone, I have a miniature cymbidium that all the leaves are turning yellow and then brown. I know it is normal to lose some leaves but it looks like they are all going one by one. It currently has 3 bulbs (one has no leaves at all) and none of them feel soft or rotten. When I got it, it did not have a ton of roots but it looked like it had enough for the size of the plant. They seemed to look ok so I potted it up in bark and I have been watering about once a week. I am giving it a little fertilizer once or twice a month. Also, I have it under my grow lights with some other plants since it is winter here.
Any suggestions would be appreciated? Can it lose all its leaves and still live? It does seem to have a new growth coming up but I didn’t expect it to lose that many leaves.

Thanks in advance for your help.