Hello,
We have been using Confluence for a year or so. Today we keep finding pages whose restrictions are set to 'Anyone can view, some can edit'. The Confluence admin or the creator of the page can change the setting to 'Anyone in Confluence can edit', but then when someone else edits the page, the restriction 'Anyone can view, some can edit' reasserts itself.
On one occasion I was editing a page at the same time as my colleague, my colleague clicked to publish his changes (without notifying watchers) and when he did so, I was thrown out and the page's permissions were restricted to 'Anyone can view, some can edit'.
The only intentional change that we've made was to install Jira Service Management a few days ago. We haven't changed any other page or space settings.
This is, obviously, a serious impediment - it's rendered Confluence unusable. Is this a known bug? Do we need to go back and review some settings after the installation of Jira SM?