Onc. 'Sharry Baby' losing leaves

[Katalyst]

Hi there,
I've had a Sharry Baby for 3 years, within the last year all of the old leaves have yellowed and fallen off, leaving only old, leafless pseudobulbs. However, every year, this year included, the new growth looks great, and sends up a flower spike in late summer. I see folks with these amazing full Sharry Baby's, that hang on to their old leaves and look great! Not mine. Two old leaves left, and they're on their way out. The tips start yellowing so I trimmed them off, then this happens (see pics). Any thoughts on why this is happening? Thanks for your help!