Thank you for reporting this.
The applications relies on the operations system's API for its internet connectivity check and it seems that this does not work as expected. We have received a few reports stating that the internet connectivity detection does not work fine in some cases and we are working on improving this. Unfortunately, this is very hard to reproduce issue because it happens under unclear circumstances and is very rare. However, we will do our best to improve this for our next release.
Please, do not hesitate to share any further feedback about the tool.
the Telerik team