The sudden lack of form notifications could be due to changes in notification settings, email deliverability issues, or updates to your HubSpot account. Recent changes to your forms or user permissions might also be affecting notifications. Nevertheless, here are a few things that might help resolve the issue based on the context provided:
Ensure that the notification settings for your forms haven't been altered. Navigate to Marketing > Forms, select the form in question, and check the Options tab. Verify that the correct recipients are set up to receive submission notifications.
HubSpot emails sometimes end up in spam or junk folders. Be sure to check these folders, and if you find any emails there, mark them as "Not Spam" and add HubSpot's relevant email addresses (like noreply@hubspot.com) to your contact list or allowlist.
Confirm that your browser allows notifications. Avoid using Incognito mode or enabling "Do Not Disturb" settings, which may block notifications.
If you're using an email client, ensure that HubSpot's emails aren't being quarantined. Also, check your email filters to ensure that HubSpot emails aren't being misdirected.
If you're working within a corporate network, make sure HubSpot's domains and IP addresses are added to your network allowlist.
Check whether there have been any recent changes to workflows or user permissions that might affect notification delivery.
If you've gone through these steps and the issue persists, I recommend reaching out to HubSpot Support for further investigation.