If you have "Press/Hold for X/Y" enabled (for your switches), but if you have a switch configured to toggle between Scene 1 & 2: if you hold down the switch too long, it does not toggle scenes (because it is probably looking to switch an X/Y state of a block). This may not be a "bug" but it is an undesirable action. If you have a switch configured for something other than controlling a block, it should not fail to function if you hold it down (too long). It should switch immediately when you press it down (regardless of how long you hold it).
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