OK, can you make a replication case for me so I can see what you’re seeing exactly?
What I would need is a recording of your speech (in the environment you’re describing) added to pathToTestFile (there is a commented-out usage of pathToTestFile in the sample app and you can read more about it in OEPocketsphinxController.h) and the changes to the sample app which will demonstrate this issue (I believe the only changes should be vadThreshold, secondsOfSilenceToDetect, the generation of your language model, and the selection of the Spanish acoustic model). Once you can demonstrate the issue to yourself using the sample app, contact me through the contact form with a place to download your recording and a description of your changes to the sample app and I will test it out and get back to you. Sorry you’re having this issue and I promise I’ll check it out.