Hmm - they differ.
But I suspect that the opening is indeed elided mostly, like that initial "i" - making it moot. If I think of it, will look in the giant 15# '30s one sometime, and see what changes they noted. Minor stuff of course.
(There are some Danish words which Merkins can pronounce only by putting hand over mouth, since we don't use our throats the same way!)
A.