API transfer and MoH

Hello. When I make an attended transfer (from incoming call in a queue) with the API, the music on hold starts for the caller, and then stops as soon as internal users talk to each other. Is it normal? how do I get the moh to continue until the transfer is complete for the caller?

Here’s the log when it happens:

Channel Local/1@Internal-00000001;1 joined 'simple_bridge' basic-bridge <xxx>
Channel Local/1@Internal-00000001;1 joined 'simple_bridge' stasis-bridge <xxx> 
> Bridge xxx: switching from simple_bridge technology to softmix
-- Stopped music on hold on PJSIP/TRUNK-00000025

EDIT: It appears to be a known bug https://wazo-dev.atlassian.net/browse/WAZO-1470