Maybe Gernot has changed something? Maybe it's a bug that has always been there, just never discovered. I know in my old earlier apps using NETWEBEND wouldn't go to the site and also terminated the app (which seems to be what you are experiencing), but I then started using one of MrT's functions to keep the app alive, which also required ALLOWESCAPE FALSE. I did actually report to Gernot prior to this what you are experiencing, although this was a long while back, when I first started devving for webOS.
Dunno.