Booking request happening randomly

Hi there,

We’re having some trouble with th WP Booking System Plugin for a few days: we found out some booking requests are not going through. There’s no pattern, sometimes it works, sometimes not.

What I noticed is a very slow admin-ajax.php execution time when the booking isn’t processed properly.

When it doesn’t work properly, different behaviors happen:
– There’s the wheel saying it is processing for a long time (about 30-40 seconds)
– The admin don’t receive the booking by email
– or/and the user doesn’t receive the auto-reply saying his request was sent

Is there a problem being investigated? Can I help to troubleshoot this to maybe help other users?

Please let me know what can be done to solve this problem, maybe linked to a new version of WordPress, we did an update last week sunday.

The page I need help with: [log in to see the link]