As you can see here, the patch is relatively simple and it should be
relatively safe to apply it.
** Patch added: "99-kile3-filechange-refresh.patch"
https://bugs.launchpad.net/ubuntu/+source/okular/+bug/1801911/+attachment/5211731/+files/99-kile3-filechange-refresh.patch
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You received
Status changed to 'Confirmed' because the bug affects multiple users.
** Changed in: okular (Ubuntu)
Status: New => Confirmed
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Bugs, which is subscribed to okular in Ubuntu.
https://bugs.launchpad.net/bugs/1801911