Proofread status is not shown on index for some pages, mainly if a page was not edited since 2012 (but also for some newer pages), eg.:
https://pl.wikisource.org/wiki/Strona:PL_Nowodworski-Encyklopedia_koscielna_T.5_001.jpeg
https://pl.wikisource.org/wiki/Strona:PL_Nowodworski-Encyklopedia_koscielna_T.5_011.jpeg
https://pl.wikisource.org/wiki/Strona:PL_Nowodworski-Encyklopedia_koscielna_T.5_470.jpeg
The index page is:
https://pl.wikisource.org/wiki/Indeks:Encyklopedia_ko%C5%9Bcielna_(tom_V)
A page status became displayed after the page is null-edited (the null-edit is non-null in fact). Tested on
https://pl.wikisource.org/wiki/Strona:PL_Nowodworski-Encyklopedia_koscielna_T.5_003.jpeg
Some backward compatibility problem in proofreadpage?
{F23072597}
(in response to Billinghurst's request for a checklist) Add to the checklist and fill it in once the pages on each wiki have been refreshed:
[] ar (needs local rights) - given the rights
[x] as
[ ] be (needs local rights)
[] bg (needs local rights)
[ ] bn (needs local rights)
[ ] br (needs local rights)
[ ] bs (needs local rights)
[ ] ca
[ ] cs (needs local rights)
[ ] cy (needs local rights)
[ ] da (needs local rights)
[x] de
[ ] el
[ ] en (needs local rights) - given the rights
[x] eo
[ ] es (needs local rights) - given the rights
[ ] et (needs local rights)
[x] eu
[ ] fa
[ ] fi (needs local rights)
[ ] fo (needs local rights)
[ ] fr (needs local rights) - given the rights
[ ] gl (needs local rights)
[ ] gu (needs local rights)
~~[ ] he (needs local rights) ~~ usage?
[ ] hr (needs local rights)
[ ] hu (needs local rights)
[ ] hy (needs local rights)
[ ] id (needs local rights)
[ ] is (needs local rights)
[x] it
[ ] ja (needs local rights)
[ ] kn (needs local rights)
[ ] ko
[ ] la (needs local rights)
[ ] ml (needs local rights)
[ ] mr (needs local rights)
[x] mul
[ ] nl (needs local rights)
[x] no
[ ] or (needs local rights)
[ ] pa (needs local rights)
[x] pl
[ ] pt (needs local rights)
[ ] ro (needs local rights)
[ ] ru (needs local rights)
[ ] sa (needs local rights)
[ ] sl (needs local rights)
[x] sr (needs local rights)
[x] sv (needs local rights)
[ ] ta (needs local rights)
[ ] te (needs local rights)
[ ] uk (needs local rights) - given the rights
[x] vec
[ ] vi
[ ] zh
Check: https://meta.wikimedia.org/w/index.php?title=Special%3ACentralAuth&target=Wikisource-bot
Nil or minimal pages in Index/Page nss, no requirement to act
* li
* mk
* pms
* sah
* sk
* th
* tr
* yi
* zh-min-nan