Hi, I have similar problem with child-pages shortcode after upgrade to WP 4.4.
I found some “solution”:
If I delete the shortcode and retype it again, it helps. Copy-paste doesn’t work, it needs to be retyped manually (at least once and then copy-paste the retyped shortcode). It seems like there are some extra not visible characters, which are not visible even in HTML code of the page. This may helps also with sibling pages shortcode.
I have many pages (on more wordpress blogs) using child-page shortcode, so manually retyping every page is not a good solution. But I am affraid that this is a WordPress bug. If you find some better solution, I would appreciate it.
Similar problem but with another plugin I found here: https://wordpress.org/support/topic/shortcode-broken-with-wp-44-upgrade?replies=15
Thanks!
I may be seeing a problem with this as well, however my issue is totally different…
All of the sidebar widgets on my theme straight up clear themselves after a given amount of time. They all move to Inactive status in the widgets manager.
I have been debugging for hours and I think it may be related to one sidebar using the sibling pages.
I am still testing but there may be some kind of bug that is shocking the whole system for my WP 4.4 install…
Kristyna thanks for your solution, that seems to work!
I checked it on my offline backup of that site.
Only problem is that LOADS of pages will need to have that code retyped… So I might just keep the old install for now, and tackle this if I have the time for it.
And hope that the bug that makes this happen is fixed before I start 😉