Is it maybe happening on specific pages? Are those pages cpu intensive?
Does it happen after edits or all the time when you open that page?
What are you editing exactly?
Also try sticking to one main project window to isolate the problem before mixing all kind of problems.
You can also try to do a full clean Wappler install, deleting all the local data - as chrome keeps lots of caching data that can eventually slow things down.
We also have “clear data” option in design view context menu that clears a bit but seems to me a full install from scratch might be best for you.
See: