How are you expecting flowTuples to extract?
The below (as you have in your sample events) is a single object array (and hence will be a single value in splunk)
flowTuples: [
1531920192,11.11.111.111,12.12.122.122,1608,703,U,O,A
1531920222,11.11.111.111,12.12.122.122,14172,703,T,O,A
]
correctly I think it should be
flowTuples: [
[1531920192,11.11.111.111,12.12.122.122,1608,703,U,O,A] ,
[1531920222,11.11.111.111,12.12.122.122,14172,703,T,O,A ]
]
If you cannot fix the underlying event you could do something in search - what does the flowTuples field in Splunk look like when it has multiple values? (ie ...search to get a flowTuples with multiple values ... | head 1 | fields flowTuples
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