Glossary entry display does not include autolinking for glossary entries that are similar to the current entry

To reproduce:

0) make sure glossary autolink filter is enabled
1) create a new main glossary
2) add two entries:

frog
comes from frogspawn

keywords: frog
autolink, whole words only

frogspawn
grows into a frog

keywords: frogspawn
autolink, whole words only

3) look at all entries

you will notice that in the 'frogspawn' entry, the word 'frog' is autolinked. In the 'frog' entry, however, the word 'frogspawn' is not autolinked. It appears there is code to prevent entries linking to themselves, but this seems to be a bit too eager! It is preventing links to any glossary entry that contains the current one, as well as to just the current one.

In other places (eg I made another entry 'zombie' 'nothing to do with either frog or frogspawn') both words link as expected.