Hi afei929,
I missed this one on my queue - really sorry about that.
After following your steps, I was able to reproduce the same issue, and I reached out to our teams as to whether this was a bug or expected behavior. While I agree it’s unexpected where the fill for the widget goes missing, this is the expected behavior for now. When converting a shape with non-adjacent borders to a custom shape - which is what happens when you enter point edit mode - each border line becomes its own shape, but they’re still represented as one shape because they’re united. You can break the shapes apart by right-clicking on the shape and selecting “Transform Shape > Break Apart”.
As for text editing mode vs point editing mode, you do have the option of typing directly into the widget, like in Axure RP 8. If you go to “Axure RP 9 Beta > Preferences > Canvas” and de-select the “Enable Single Key Shortcuts” checkbox, this will bring back the ability of typing directly into the widget to enter text, without having to double-click. If you wanted to keep single-key shortcuts (e.g. when you press [T], click-drag to produce a shape with text pre-populated), but would prefer not to double-click, you can press [return] on the target widget, and this should also allow you to type directly into the widget as well.
Please lmk if you have any thoughts about this, or have any questions. 