In mulitisite where im testing wpmudev plugins, on local, I have main site & one more site.
I'm seeing same issue as another person asked before
here on forum.
I cant uncheck the option from the title and save it.
Since multisite is what wpmudev is mostly about, I presume there should be some knowledge of this issue.
I tried disabling all plugins on all sites - except those mu-plugins by wpmudev, like
gateway relay and wpmu assist.
I enabled WP_DEBUG, theres no clues in log files.
Other options save ok.
Im not sure, but when I try to save it, it seems like the form option doesnt even get sent, cause I tried inspecting the POST parameters.
Froom googling, I saw another person here had the same issue, thats the link I pasted.