module-bluetooth-device is loaded when the first audio profile is discovered. There may be other profiles appearing later. module-card-restore may have one of those later profiles stored, and if so, restoring the card profile fails. module-card-restore should monitor for new profiles, and do the profile switch if the failed profile appears later. This bug doesn't affect any released version.
Fixed: http://cgit.freedesktop.org/pulseaudio/pulseaudio/commit/?id=b8bf331b393943285a4a7efbec1f0032be5599d9
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