Bugs on partial file element

Hi, my name is Opan and thank you for this great software!

I have a little problem. When i try to simulate a click action in Pinegrow, the element will be disappear. But this only happen when i use another view (e.g: Phone screen), but not in default view/screen size. I upload i gif to be more clearer.

As you can see on the gif above, on the left panel, i try to simulate click on dropdown twice, but after that is disappear. Is this bugs or something else? It’s works before i try to using partial file feature. Any ideas how to make it works again? And oh this also happen when i try in browser preview mode.

Thanks in advance
Opan Mustopah