After migrating to 4.3 (from 2.8 via 3.5.17) we find that links of the form #NameOfAnchorOnPage are displayed with the leading #.
eg: #NameOfAnchorOnPage now shows as #NameOfAnchorOnPage instead of NameOfAnchorOnPage
and View Storage Format shows it as
<ac:link ac:anchor="NameOfAnchorOnPage"><ac:link-body>#NameOfAnchorOnPage</ac:link-body></ac:link>
FYI: We have had many other problems on the way, many being/been dealt with by Josua Masikome.