Hi Mike and everyone,
We too have been experiencing widgets just not saving the updates and the page reloading losing precious work. We have two different Kentico environnements, both running version 9.
I will ask Kentico if we could have the fix 10.0.14 prepared for version 9, but the description seems a bit different from what we are experiencing (it seems to happen for most widgets, especially the ones with complicated configurations). The description of 10.0.14 is
In certain cases, the Editable text widget could lose its content when moved from one widget zone to another.
Will let you know if I find anything.