To replicate you need to select a Network other than the top one in the list and hit Remove - Remove in the dialog box - that network gets removed and then immediately presented with Remove dialog for next in list - press Remove on that dialog - app crashes.
Selecting the top in the list and removing works as expected - that Network is removed and no further dialog is presented.
OK - just replicated this.
To replicate you need to select a Network other than the top one in the list and hit Remove - Remove in the dialog box - that network gets removed and then immediately presented with Remove dialog for next in list - press Remove on that dialog - app crashes.
Selecting the top in the list and removing works as expected - that Network is removed and no further dialog is presented.