Yes, the scenario I was testing was exactly as you guessed - I created a document on the server. That was sent to the mobile almost instantly 
However, when I then deleted the document also on the server then the deletion is not sent to the mobile…
The output of .....:4985/data/_config is:
{
"server": "http://ds9:8091",
"pool": "default",
"bucket": "data",
"username": "xxxxxxxxx",
"password": "yyyyyyyyyyyy",
"name": "data",
"sync": "function (doc, oldDoc) {\n // Document type is mandatory\n if (oldDoc && oldDoc._deleted){\n // Server doc. deleted -> just propagate this on the public channel!\n channel('!');\n return;\n }\n // Document type is mandatory\n if (!doc.type){\n throw({forbidden: \"Document type is required.\"});\n }\n if ((doc.type == 'EnvLake' || doc.type == 'EnvMeasurement' || doc.type == 'Feedback' || doc.type == 'ActivityLog') && oldDoc){\n throw({forbidden: \"Document type not allowed to sync to mobile...\"});\n }\n // All public docs are available in the app\n if (doc.ispublic) {\n channel('!');\n // return;\n }\n // All non-club fishing trips and catches are available (for stats)\n if ((doc.type == 'FishingTrip' || doc.type == 'Catch') && doc.clubonlykey == undefined) {\n channel('!');\n }\n // All non-specific user info is available (for stats)\n if (doc.type == 'User') {\n channel('!');\n }\n // Only docs \"owned\" by user can be updated\n var key;\n if(doc.type == 'User'){\n key = doc.key;\n } else if(doc.type == 'FishingTrip' || doc.type == 'Catch' || doc.type == 'Photo' || doc.type == 'Private' || doc.type == 'Image'){\n key = doc.userkey;\n }\n if(key){\n requireUser(key);\n channel('channel.' + key);\n access(key,'channel.' + key);\n }\n\n // Creation of new Feedback docs (perhaps without userkey)?\n // Creation of new docs?\n // Updates to existing docs?\n // Readonly for all non-user specific docs...\n}",
"users": {
"GUEST": {
"name": "",
"admin_channels": [
"!"
],
"all_channels": null,
"disabled": true
}
},
"revs_limit": 20,
"import_docs": true,
"import_backup_old_rev": false,
"unsupported": {
"user_views": {},
"oidc_test_provider": {},
"api_endpoints": {},
"warning_thresholds": {
"xattr_size_bytes": 943718,
"channels_per_doc": 50,
"access_and_role_grants_per_doc": 50
}
},
"deprecated": {},
"enable_shared_bucket_access": true,
"session_cookie_name": "",
"allow_conflicts": false,
"num_index_replicas": 0,
"use_views": false
}
Please note that I have changed the “import_docs” to true following the documentation for sync_gateway that specifies this as either true/false. Only an older example shows “continuous” - but it is not part of the description of the variable (for 2.5)… I also noted that in another post: Issue with sync after upgrading to 2.5