Push notifications can get blocked for a few reasons. One common reason is sending too many messages in a short period. This can annoy users and make them block future notifications. Another reason could be low-quality or misleading content that users don’t find helpful. If your message looks spammy or promises something it doesn’t deliver, people are more likely to block it. Also, if your notifications come at the wrong time, like late at night or too early, people might get tired of them quickly. To prevent this, try sending messages that are clear, useful and spaced out properly. Make sure what you're sending matches what users expect to see. Use honest and short titles, and test different send times to find what works best. Have you noticed anything else that might cause blocks?