Sidebar highlighted letters do not seem to be updating when rendering different data

[mobpakrd]

Hi, I'm using the alphabetlistview in two locations in our app, one with a large list of content and another with a smaller subset of that list. If I render the smaller subset first, the highlighted letters are correct (only the letters where there is content are blue). If I then render the larger set, more letters will be highlighted and it is also correct. However, if after I render the larger set I go back and render the smaller set, the sidebar is in the same state it was in for the larger.
I've given a look at the library and couldn't find an obvious reason for this and the data we're passing in looks right. Is this cached in some way and isn't responsive to changing data? I can provide any other info that could be useful.