We encounter implausible values when getting page view counts as realtime figures compared to page views as reporting figures.

The reporting page view events are queries like so:

let [response] = await analyticsDataClient.runReport({
        property: `properties/${propertyId}`,
        dimensions: [{ name: 'eventName' }],
        metrics: [{ name: 'eventCount' }],
        dateRanges: [{ startDate: 'yesterday', endDate: 'yesterday' }],
        dimensionFilter: { filter: { inListFilter: { values: ['page_view', 'user_engagement'] }, fieldName: 'eventName' } }
    });

This currently returns yesterday’s 70,000 page_view and 100,000 user_engagement events.

Now, we retrieve realtime values like so:

let [response] = await analyticsDataClient.runRealtimeReport({
        property: `properties/${propertyId}`,
        dimensions: [{ name: 'eventName' }],
        metrics: [{ name: 'eventCount' }],
        dimensionFilter: { filter: { inListFilter: { values: ['page_view', 'user_engagement'] }, fieldName: 'eventName' } }
    });

This returns 8 page_view events and 2700 user_engagement events. The ratio beetween page_view and user_engagement remains quite the same when running the realtime report at different times of day.

It’s obvious that realtime page_view values seem to be completely wrong. They should be about 70 % of the user_engagement count.

Question: is this a bug in GA? If yes, what can I do about it? If no, what am I missing?