https://devzone.nordicsemi.com/f/nordic-q-a/51418/app_button-library-fails-to-recognize-a-button-press-if-another-button-transitions-within-the-debounce-windowHERE is the fix for this problem. It has been reported before (by others) with no reply. I hope that this fix or its equivalent will be incorporated into the next SDK release so that others will avoid having to debug and fix this themselves. Fileen-USTelligent Community 13Tue, 27 Aug 2019 07:39:50 GMThttps://devzone.nordicsemi.com/thread/206243?ContentTypeID=1Tue, 27 Aug 2019 07:39:50 GMT137ad170-7792-4731-bb38-c0d22fbe4515:52226494-7978-449b-8c33-43d72e6e15d9AndreasF<p>Hi.</p> <p>Thanks for noticing and thanks for the proposal, I&#39;ve make an internal ticket on the issue :-)</p> <p>Best regards,</p> <p>Andreas</p><div style="clear:both;"></div>