League of Legends (LoL) Question: Why my guide got deleted after logging in?

Logging in reloads the page, so you wouldn't be able to keep working on the same guide if you created it as a guest and then logged in to your account.

I don't think there's any way for me to recover your guide unless you fully published it as a guest. If you did publish it, then link me the guide or tell me the title and I can try and find it. However it sounds like you might have to start over, sorry. :(

that's an unfortunate thing i hope you make a really good guide as a come back <3 <3
Already +1 for just being here <3 ;P

For the future I advise to :
1) Open a second window and connect there while first window with all your work is still open.
2) Go back to the first window with your work then click save.

Beyond :
Saving all your work from time to time in a word file may be a good idea too (many times it did allow me to come back to previous versions after so many mistakes I was unable to correct them anymore)