Studio will not give you an option to save like it normally should if you exit out right after you play solo.
This bug is crucial and when you start up studio again, it doesn’t say you have any autosaves. Please fix immediately as to me and many other people who save this way, it can cause hours of work to be gone within just a couple of clicks.
Put [ ROBLOX CRITICAL ] in the title. Yeah I’ve ran into this for a while now.
Can confirm. Lost about 3 hours of scripting from this, and took me about 40 minutes to full figure out how I did the lost script.
…This just happened to me, like ten minutes after reading this thread 
According to here you’re supposed to start your post with ROBLOXCRITICAL, all one word.
happened to me and one of my friends