Which Le Meridien in Dubai are you asking about? I found 4 different Le Meridien hotels in Dubai. I picked a random date in March and another date in April. All 4 showed award availability for both sets of nights I chose. So not sure which hotel you are having trouble finding award inventory for.

OK, I guess only one of them is titled "Le Royal Meridien" (Le Royal Meridien Beach Resort and Spa). But it had award availability for both sets of nights I chose. So not sure if the problem is gone or if I'm looking at the wrong hotel.