"Raidless Gyms... How they exist and is there a way to get the Raids back ?"

#PokemonGO: I can only see one of our Gyms from Home and in that Gym have only been Raids in the first 2 Weeks after the Gym Rework, since than, there hasn´t been a single Raid. 20km away, there´s also 6 Gyms without Raids, maybe because these 6 Gyms are 100% Blue everytime ? (my Gym was about 90% Yellow in these first Weeks) Is there a Way to get Raids back ? Today, that Gym changes everyday the Color and is accepted to be a normal Gym via /r/TheSilphRoad http://ift.tt/2AxaSfy