Looks like WoBo found my bug report and decided it was worthy enough to create a whole video about it ;-)

Just verified this yesterday. Both the sound bug when shooting indoor as well as the bug when shooting with a silencer in prone position (both shown in Wobo's video), are still present in the stable version.

Is there any news on this? Looks like these sound bugs are also in 1.28 stable if I'm not mistaken, right?