I installed a small multiroom system in my home using 2 „Raspberrys Pi“ and 2 „Iquaudio Digiamp+“.
One Pi is dedicated to the kitchen and the second one to the bathroom, so they appear on my list of airplay devices on my iMac as „kitchen“ and „bathroom“.
I got the following problem: after a while (let’s say 20 mn) the „bathroom“ device change its name in the list to „bathroom #2“ and is no more working (no sound).
Please check both the settings of your Squeezebox Server web interface for shairtunes2 in the plugins section and the audio player menu shairport. If both are active at the same time, this might occur. Select which solution works best for you and keep it.