ios - Retrieving a child returns null snapshot -

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i have 2 child nodes setup in firebase database , can view both of these in firebase database viewer. both these child nodes @ root level. when access child nodes using piece of code:

[ref observeeventtype:feventtypevalue withblock:^(fdatasnapshot *snapshot) {...}

the child labelled "usd2016d04d24" returns correct json data. however, when access child labelled "usd2016d04d25", snapshot returned null. can see thisscreenshot, there valid data saved within latter node. can't figure out why there discrepancy in reading data 2 similar nodes. pointers?


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