I wonder if Goirgio's magical intervention has allowed for the detection of the gestures, but that the reader software needs to be looking for them and have responses prepared.
It could be that "pinch & zoom" requires a response from the reading software, whereas the frontlight is a hardware response under the FW. Kobo's reader may have prepared responses to those gestures and maybe the Adobe Reader Kobo uses for .epub doesn't.
Luck;
Ken
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