emacs info viewer and @multitable

[defanor]

Multitable appears to break representation of headings in the emacs
info viewer, drawing them as is instead of using another font. Here is
a texinfo example:

----test.texi----
@node Top
@top Test
@chapter Heading-1
@multitable @columnfractions .2 .4 .2
@headitem Type @tab Field @tab Example
@end multitable
@chapter Heading-2
test
-------eof-------

To reproduce:

makeinfo test.texi && emacs -Q --eval '(info "./test.info")'

Removing @headitem or replacing it with @item helps, but then there is
no headitem. Same happens with @section and @subsection instead of
@chapter.

GNU Emacs 24.5.1, GNU texinfo 6.0.