dropouts airplay streaming

I own three Airport Express' (2nd Generation) that I use strictly as Airplay access points for speakers. All are on firmware version 7.8.1. They worked great for several years as Airplay access points. However, roughly a year ago I began noticing these devices dropping Airplay randomly. There...

I have been streaming with Airplay for years. All of a sudden about a month ago, Airplay will start dropping out after fifteen to twenty minutes. I have multiple streaming locations in my house, but ONLY those with Airplay have dropouts. The only possible errors are with Airplay via Express...