There is an issue, page not saves when you have slow connection in offline mode. Looks like it sends request to the server and only after request is received, it saves changes... If it works as I expect we need to changed this to work in parallel or asynchronously.
OlegKlimenko
commented
5 years ago 
There is an issue, page not saves when you have slow connection in offline mode. Looks like it sends request to the server and only after request is received, it saves changes... If it works as I expect we need to changed this to work in parallel or asynchronously.
Can you please check this?