If is is a deficiency there is not cause for alarm as such are not going to kill it overnight. I suspect the problem may be due to some lack of nutrients as the plant tries to establish a good root system. In its current state its roots are not that extensive. I would try adding a little K and Mg using whatever fertilizers are available in your area. Just don't overdo it. The palm will get established in time and should improve. The following web site offers more info on palm tree nutrition:
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