Firecracker's user-generated Notes and highlighting functionalities are limited to strictly standard characters. If you apply the annotator by clicking and dragging your cursor over a special character (such as alpha, beta, bullet points, characters in other languages, or rich text) then your annotation will not save. Similarly, if you attempt to save a note containing special characters such as the ones listed above, then your Note will not save. 

We are investigating how to support more special characters, but at present, the annotations (highlights and notes) can be applied to standard alphanumeric characters only. 

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