If:
- a field is used in an assertion of interest in facet A
- and that field changes
- to a value that causes the assertion of interest to overlap
with some facet B's assertion of interest
- and an assertion matching that interest was already known to the actor,
Then:
- previously, facet A would not be informed of the matching assertion
- but now, it is informed of the matching assertion.
This more or less only affects "on asserted" endpoints.
The change here should be written up as an erratum to chapter 5 in my
dissertation. Also, syndicate/js needs to be checked for the bug and
probably fixed in an analogous way.