[tex-eplain] a new index bug?

[Gérald Tenenbaum]

I am presently working on a large document (a math book between 600
and 700 pages).
I have discovered that the last entries of the index do not appear in
the typeset when they occupy only a few lines on the last page.
Has anyone already encountered this problem?
I do not see how to reproduce the problem on a test file. However, if
I change the font size of the index so that it finishes in the middle
of a page, then it comes out complete.
Thanks for any help or info.
Kindest regards,

Gérald