Adjusting the namaaz postures on account of the microphone

I have noticed that in certain Masaajid, where a protruding mic is used as compared to the clip-on mic, the Imam swerves in a crescent like motion as he proceeds from Qiyaam into Ruku. Again, when he returns from ruku, this swerve, clear and deliberate, like a crescent motion , is repeated, again, when he proceeds into Sajda and when eventually returning to Qiyaam, in each and every Rakaat, whenever moving in or out of Qiyaam, this swerve motion is clear and deliberate and apparent. In Some Masaajid, the protruding mic which is positioned lower for the sajda also requires this additional deliberate swerve motion too so this is a new but clear and deliberate 'additional swing motion' to avoid hiting the mic, which has been specifically positioned directly in front of his mouth. Although his chest does not move from the direction of Qiblah at all, this does seem like a new, foreign and additional motion in Salaah. Please comment in general as well as specifically whether this affects the value and or validity of this Jamaat salaah, as it is a 'new norm' of Salaah adopted by the Imam out of necessity, to avoid hitting the mic as he moves from one position of Salaah to another.