With the upgrade to 1.20wmf5, transcluded pages that have an LST section (through Proofread Page) now do not drop the <noinclude>'d header and footer within the sections that are transcluded (starting or terminating transclusions).

Exhibit 1
https://en.wikisource.org/wiki/Gregory,_George_(1790-1853)_(DNB00)

I am guessing that it is in #LST rather than something in [[mw:Extension:Proofread Page]]. It may be the latter!

Where the transclusion is of a section within a page it works fine

Exhibit 2
https://en.wikisource.org/wiki/Gregory,_George_(1754-1808)_(DNB00)

Where there is full transclusion of consecutive pages, then the noinclude tags work as expected. See difference between exhibits 3 and 4 where I have shifted the partial transclusion to later pages and how the problem just occurs on the terminating page which has the transclusion

Exhibit 3
https://en.wikisource.org/w/index.php?title=Wikisource:Sandbox&oldid=4153465

Exhibit 4
https://en.wikisource.org/w/index.php?title=Wikisource:Sandbox&oldid=4153467

I would like to ask to a rollback to previous version "1.20 wmf 4" until this issue is resolved. We have probably between ten to one hundred thousand pages that will be affected by this bug at enWS, and this will be Wikisource wide

Alternatively we need to get the problem resolve really really quickly

Version: REL1_20-branch
Severity: critical