Wondering if you experience the same. In a custom trigger I have defined the subscribe / unsubscribe endpoints. When the user makes a change to the recipe monday will go through the unsubscribe and then subscribe events. All works fine until my endpoint send a non-200 status from my unsubscribe endpoint. Monday will fail obviously, no problem.
Any successive call monday make to my unsubscribe endpoint for that recipe contains an empty payload.
I am discussing this with the appsupport team but wanted to know if you experience the same. Look like this bug is introduced in the weekend of July 24.