After finishing and submitting my Update, I contacted Apple and asked for an Expedite review. Within one hour, Apple reviewed and released the App.
This was probably world record. A big thank you to Apple!
Unfortunately, there was a bug in the UPnP Scanning engine which was causing the App to crash when there is a ‘misbehaving’ UPnP device.
As this happened in the UPnP Scanning engine which is also used for the new Advanced Scanning feature, the new feature wasn’t working for some of you.
I hope that the new update will now work for you as expected.
To locate and fix this bug, it was very helpful that some of you enabled Crash-log submission in the Settings ( iOS Settings -> Privacy -> Analytics -> enable: Share Analytics as well as Share with App Developer). This way, I was receiving the anonymous crashlog via Apple and was able to analyze the cause. Thank you!
Have a great weekend (at least I will have one now as the update is out),
UPDATE Sunday 1st Oct:
In case some of you are wondering about the availability of the update, Apple currently has major outages. They maintained some of their servers yesterday, now claim that everything should be up and running but that obviously is not the case. Some support websites are not available and other Apple websites have wrong contents. So much to Apples world record of releasing Network Toolbox.
UPDATE Monday 2nd Oct:
Finally, the new update seems to be available after almost two days.
Thanks for your patience.