My start page is my label NEXT. Every time I remove the label from tasks they all pop up again in my Start page.
If you change your start page to another query, or one of the defaults does this still happen, when editing a task?
And to confirm, tasks with such label attached, are still within that label view when they do not have the label attached anymore?
Does this happen with the web version as well?
This is issue does NOT happen with the web version. Indeed, whatever I do with the start page on the Android app shows up on the Web version even AFTER items I had moved off label (Next) reappear on my Android app start page.
Please try uninstalling the Android app, and reinstalling it. There could be some glitch in the install and this could resolve it. You could also try clearing the data before doing this, in case you do not want to uninstall.
Let me know if the issue persists.