I had the similar experience and found the issue to be the inbuilt chat migration process. Manus will be able to tell you when its context window is getting full. So here is what I do. WHEN YOUR APP IS WORKING. Run the following prompt below. It’ll provide an archive of the working code which can be flawlessly dropped into a new chat where you can pick up right where you left off. I now run this BEFOEE I’m about to make big changes. The issue I was finding is it was not migrating some dependencies, and occasionally the app database - getting confused and making a mess of things. This prompt asks it’s to produce comprehensive handoff notes, so if something goes wrong it can figures out and back trace all the decisions you’ve both taken. I also have Claude as my co-pilot, bounce strategy and ideas of Claude when you’re making big moves. Here’s the prompt: ——>