I tried quite a few as I obviously thought the problem was with the particular widget.
I have several other android devices, and on all of those the widgets works just fine - ie refresh at the right time.
Unfortunately, today I noticed that the widgets on my homescreen have ceased to update properly.
The widgets affected are Zooper Widget and Simple RSS Widget.
I wouldn't recommend using that option as it is no longer supported, and the HTML Widget is far more robust.
I also found it by searching "HTML Widget" in "Content".
So, I tried clearing Nova Launcher's cache and restarting the launcher, but unfortunately to no avail. this will ensure that they do not hibernate therefore eliminating the possibility of the widgets not updating.
The widgets update only once after but cease to update subsequently. also, you may want to look into other (Task/Ram) cleaner apps such as CM Cleaner where you again may need to put these respective apps into the exceptions list.
Then using the doc Ashleigh provided you can set it to refresh.
Ray, That is the the HTML Item, which is no longer supported, and can only be added in our Classic Editor at