Playlists Double-Playing Artists While on Shuffle

[firebuff101]

Recently something odd has been happening with all of my playlists. Even though I keep them all on shuffle, if I have 2 or more of an artist's songs in the playlist, they always play back-to-back songs from that atist before moving on to the next song. This only began happening within the last week or so. I am using Premium and this occurs on both Windows 10 and Android.