forwarded 830523 https://bugs.freedesktop.org/show_bug.cgi?id=97117 retitle 830523 tags 830523 + upstream fixed-upstream thanks
It seems this bug has been reported and even recently fixed upstream. The Freedesktop.org bug title is about bluetooth, but it appears to share the underlying cause with our USB case, and later comments include a scenario exactly repeating the one described here.
