LibreOffice 5.1 toolbar display number of the currently visible page in the bottom toolbar, but in LOOL page with the cursor position. Also, this is probably related, getCurrentPageNumber/goToPage API methods do not work in view mode.
Could you please try with LibreOffice 5.3 Online -> https://www.collaboraoffice.com/releases-en/collabora-office-5-3-released/? I have set the bug's status to 'NEEDINFO'. Please change it back to 'UNCONFIRMED' if the bug is still present in the latest version.
Ah, I tested with Collabora Online Development Edition 2.1.3-4, office version details from logs: { "ProductName": "Collabora Office", "ProductVersion": "5.3", "ProductExtension": ".10.22", "BuildId": "91005a37b489c9598566e57a6534eb9b6cca3b25" }
Yes, confirmed with master as well. LOOLWSD master.. (git hash: 7bc510c1) LOKit LibreOfficeDev 6.0.0.0.alpha1 (git hash: e07606f)