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We have a few apps that use Sitewide block positions. These apps work if put on one page of the site but that makes them not ideal. Skysa, Bing for example. We cannot update these apps until phpFox fixes their bug, https://github.com/PHPfox-Official/phpfox-v4-issues/issues/1794 . They appear to be in no hurry to do so as it doesn't even have a "fixed" or version label.
For those of you waiting for those apps to be updated, please complain to phpFox to get them to fix that bug. It should be fixed asap as we are sure many of you use sitewide blocks for other things.