I test from my side, and there was also one Web notification appeared. I have reported that to our product team and will wait for their reply. (Btw, which version do you use now? 4.4.8.1000 or 2000?
Besides, since 4.4 is with an old core for this old version, and now developers are busy with new version of MX4.9 and 5.0, so in order not delaying your work, we recommend you to download MX5 or MX4.9.3.1000, with which I didn't encounter this problem.