Voiceflow didn't save several hours of work

Hi there, yesterday I created a flow which I wanted to continue today but all the work is missing.

I didn’t upload it to Alexa because I wanted to finish it first. Is there sill any possibility to retrieve the data or must I live with the fact that I have to create it all over again?

Seems like the autosaving function only works for current sessions and an upload is mandatory to continue hassle free.

Can someone confirm or is it an unlucky bug?

I have also come across this on occasion. Frustrating for sure.