Not sure if your data is coming in JSON or not, but I've seen the same issue with KV extractions with JSON. I had to add a local props.conf with the below stanza to the SH to resolve. This disabled the KV_MODE config on the SH.
[source::foo]
KV_MODE = NONE
You can disable the KV_MODE on either the SH or the forwarder. Disabling on the forwarder will use search-time extractions, disabling on SH will use index-time extractions.
Again, not sure if your data is JSON or not, but hope this helps.
... View more