flaws in web app

I'm glad to see the web app has become available, allowing to work on the maps with ipads. However, the web app running on ipad is full of flaws. Here's a selected list of them:

- the map tends to move/shift its central viewing position when I tried to zoom in or out.

- In the text edit mode, the cursor is one character ahead of where it should be.

- In the text edit mode, you cannot move the cursor when you want to modify the texts.

- it frequently clashes.