This was an old problem, that sort of went away. I am working on a huge file (pythonista 3, non-beta) and am seeing it again. I will type
mainView['tableview_prog_display']
as I type a period after the closing brace to type in a method, pythonista crashes. This is a valid ui.TableView subview. This is just one example. Seems to always occur when adding/changing an instance method or instance variable