Old dashboard version reappears

I did a bunch of edits to my main dashboard over the last few days. then today I noticed that an old 'version' was suddenly back. I hadn't touched the system at all, and then boom, regression. Any ideas what could cause this? Am trying a restore now to see if I can get it back.

Did you do a reboot just before that happened? It could be an auto-recover during boot which went back to a previous backup.