ProactiveSubscriptionChanged doesnt send Notification Activation message to skill lambda

I have deactivated the skill "Goal Notifications" because when notifications are activated (ProactiveEvents) in the app the skill keeps saying they are disabled.

I have verified the lamda and I am not receiving any "AlexaSkillEvent.ProactiveSubscriptionChanged" type requests from Alexa. I use that call to internally activate user notifications.

Do you know what may be happening? I haven't changed anything (the skill takes almost a year without updates).

This is a fragment of my skill manifest:

"events": {
    "publications": [
        { 
            "eventName": "AMAZON.SportsEvent.Updated" 
        },
        { 
            "eventName": "AMAZON.MessageAlert.Activated" 
        }
    ],
    "subscriptions": [
        { 
            "eventName": "SKILL_PROACTIVE_SUBSCRIPTION_CHANGED" 
        }
    ],
    "regions": {
        "EU": {
            "endpoint": {
                "uri": "arn:aws:lambda:eu-west-1:XXXXXXXXXX"
            }
        }
    },
    "endpoint": { 
        "uri": "arn:aws:lambda:eu-west-1:XXXXXXXXXX" 
    }
},
"manifestVersion": "1.0",
"permissions": [
    { 
        "name": "alexa::devices:all:notifications:write" 
    }
]