Document text lost and replaced with 504 error!

Today I worked on a document for several hours in OnlyOffice Personal in my browser. I suddenly got a “connection lost” message. When I reloaded the document, the entire text of the document was gone and replaced by an error message:

The request could not be satisfied.

CloudFront attempted to establish a connection with the origin, but either the attempt failed or the origin closed the connection. We can’t connect to the server for this app or website at this time. There might be too much traffic or a configuration error. Try again later, or contact the app or website owner. If you provide content to customers through CloudFront, you can find steps to troubleshoot and help prevent this error by reviewing the CloudFront documentation.

Generated by cloudfront (CloudFront)
Request ID: l6Ky7UU9FxC3HHJdKqcXnwSUdpByiWvvgBPJ0UjPmmNapT6WyXFbPg==

As in, the entire text of my document was deleted, and this error message was the text instead.

I was able to restore a previous version of the document, but the version was from several hours prior, so I lost a lot of work. This is very upsetting. Is it possible to retrieve the work I lost before the connection error? Otherwise, I hope this bug is fixed because I don’t know whether I can continue trusting OnlyOffice.

Hello @SceoMyntan
Please accept our sincere apologies for this situation. Two days ago we faced temporary difficulties with the Personal, but we fixed the situation quickly. We hope such a situation does not occur again.
We provide the best solutions for our users and I can assure you that we will do everything to ensure that such situation does not arise again.