Gateway Event Scripts Window Missing Events

Does anyone know what would cause the gateway event scripts window to open with all the events missing? This has happened numerous times and the only way I found to fix it is to re-open the project.

This kind of thing happens to me when I am working over a weak connection or VPN.

The issue with mine is happening randomly with a good connection..
I had to minimize the designer to jump into another app and when I went back into the designer (about 2 minutes later) the gateway events was blank again.

My concern is that if the event window is blank and I click save (because of other changes in the designer I've made), will it erase the tag change events I had in the project?