Pokecoins Continually Disappearing

Raids have reinvigorated the game, but my daily distribution of Pokecoins from Pokémon stationed in gyms are disappearing! A Pokémon returns with fifty coins, the coins appear in my account, then when I check later in the day or go to buy a Raid Pass, the coins are gone. This has happened to me daily for five or six days. What the heck?

Mojo Jojo 787 about Pokémon GO, v1.37.2