Sorry, I seem to have missed this post beneath the many ones coming in that weekend.
Best would be to send a log-file with a short description of the problem and the exact time when it occured to our support team at contact@nuki.io, so they can check the details of what happend.
Our support team tried hard to catch up with all the demand so you should not have to expect as long response time as we used to have.
In any case it is best to send them log files where we can check the errors and get back directly to you with further questions. (It would be especially interesting if in your usecase the App uses Bluetooth-fallback when in the Wifi. - You could quickly test it yourself by trying to deactivate bluetooth when connected to the Wifi and in range of the Smart Lock.)