@gacarrillor can you show example code ending up passing that kind of URI to the OGR provider ?
I ask because if I open an sqlite file like the one found under the testsuite and double-click on the layer I get a "Source layer" in the properties which is like this: /usr/src/qgis/qgis-2.18/tests/testdata/qgis_local_server/test-project/features_v3.sqlite|layerid=1