Sharing image from Messages does not work / Conceptual problem with sharing files in place

[attah]

REPRODUCIBILITY: 100%
OS VERSION: 4.5.0.18
HARDWARE: Xperia 10 III
UI LANGUAGE: Swedish
REGRESSION: Yes

DESCRIPTION:

Sharing images received over MMS to anything that does not have the CommunicationHistory permission fails.

PRECONDITIONS:

Image received over MMS.

STEPS TO REPRODUCE:

1. Share an image from the Messages application (to basically anything that is not a Jolla app).
   e.g. via SeaPrint share plugin(version 1.0) to SeaPrint (version 1.3 - soon in store), or to an Android application like LLCrop.

EXPECTED RESULT:

Image can be read by the receiving application.

ACTUAL RESULT:

Image can not be read by the receiving application.

MODIFICATIONS:

None.

ADDITIONAL INFORMATION:

Sharing a resource by sending a path to it seems conceptually broken together with SailJail.
This would assume that the target application must have the same permissions, which generally is not the case.
Sure; it could be argued that image-receiving applications should at least have access to Pictures, but then the sending end must make sure to put it there first, which might be a lot of hassle.

I have previously asked for a neutral ground to share temporary files to/between jailed applications, but perhaps even otherwise “permanent” files needs it too. Or maybe, the whole thing should go over dbus, and the receiving end be responsible to create a file if needed? This is what i do for plaintext in SeaPrint right now, and it’s not very convenient. It is probably not compatible with sharing to Android apps either.