Offline Map: Reference layer not show in ODK Collect

Hello,

I'm facing the same issue that dbk
@mathieubossaert : I read the thread you mentionned. Tell me if I'm wrong but I don't understand the same thing. In this response Collect will need to stop using /sdcard/odk for files - #10 by LN LN said that it's still possible to you a SD card to store mbtiles, but the path to access it has changed.
As @dbk , I store my mbtiles in /sdcard/Android/data/org.odk.collect.android/layers/ and I can't read them from "Settings -> Map". But if I put them in the phone internal memory ("Stockage_interne/Android/data/org.odk.collect.android/files"), the mbtiles show up. The settings screen tell me that it founds in : "/sdcard/Android/data/org.odk.collect.android/layers/ " ...
I'm a bit lost !
Is somebody successfully load mbtiles from an sd card ?