Console error periodically appears while paging through annotations.

[codyml]

It's this:

Uncaught TypeError: Cannot read property 'nodeType' of undefined
    at Object.Util.getFirstTextNodeNotBefore (js_xVEwTLPmTdecPZVKMcgFyh5VB5MTMzjHFBsbU4sL0Jo.js:16)
    at BrowserRange.Range.BrowserRange.BrowserRange.normalize (js_xVEwTLPmTdecPZVKMcgFyh5VB5MTMzjHFBsbU4sL0Jo.js:16)
    at Annotator.<anonymous> (js_xVEwTLPmTdecPZVKMcgFyh5VB5MTMzjHFBsbU4sL0Jo.js:16)
    at Annotator.getSelectedRanges (js_xVEwTLPmTdecPZVKMcgFyh5VB5MTMzjHFBsbU4sL0Jo.js:16)
    at Annotator.checkForEndSelection (js_xVEwTLPmTdecPZVKMcgFyh5VB5MTMzjHFBsbU4sL0Jo.js:16)
    at HTMLDocument.<anonymous> (js_xVEwTLPmTdecPZVKMcgFyh5VB5MTMzjHFBsbU4sL0Jo.js:16)
    at HTMLDocument.dispatch (js_9ghOzpywkUSGMtnNnMGS7mA2XEN0DUwNX9wpktc9bCo.js:3)
    at HTMLDocument.i (js_9ghOzpywkUSGMtnNnMGS7mA2XEN0DUwNX9wpktc9bCo.js:3)