The bloom provided by the client (on demand of the hub) is only updated when there is a change in your shares , and the "partitial" sharing does not seem to send that info to the hub so the hub does not request a new bloom and this way that "part" will not be found ... :)
The bloom provided by the client (on demand of the hub) is only updated when there is a change in your shares , and the "partitial" sharing does not seem to send that info to the hub so the hub does not request a new bloom and this way that "part" will not be found ... :)