That reminds be of other nasty (and quite old) bug (which I’m sure was reported but I don’t remember where), it seems that preambles are often discarded in the automatically generated doc: compare for instance: tsdl 0.9.9 · OCaml Package and Tsdl (tsdl.Tsdl)
( the whole first paragraph " Consult the binding convention… etc" that can be found in the latter link has disappeared in the former.)
There are many other instances of this bug. The preambles of all modules of the Bogue doc have similarly disappeared.