From the Manual......... (Sounds like you have it set to 'Current'?)
DEFAULT SCENE
Normally, when you load a preset, it starts with Scene 1 selected. The AX8 offers two ways, however, to change the Scene that is selected when you load a new preset.
TO CHANGE THE DEFAULT SCENE GLOBALLY...
The SETTINGS page of the GLOBAL menu (p. 79) includes an option called DEFAULT SCENE. This globally determines which scene will be pre-loaded whenever a new preset is selected. Options include Scenes 1–8, or “CURRENT”, which causes the current scene to remain selected when the preset changes. For example, if you had separate Clean and Crunch presets each set up with Delay and Reverb OFF in Scene 1 and ON in Scene 2, you could begin on the Clean preset, switch to Scene 2 to turn the Delay and Reverb ON, then change to your Crunch preset where Scene 2 would be pre-selected—causing the Delay and Reverb to remain ON.
TO CHANGE THE DEFAULT SCENE FOR A SPECIFIC PRESET...
You can also change the default scene for an individual preset. Find the preset-level DEFAULT SCENE parameter on the Config (CFG) page of the main menu. (Press PAGE 3x from the Footswitch Screen.) Options include Scenes 1–8, or “CURRENT”, which causes the current scene to remain selected when the preset changes. The default setting of GLOBAL causes the preset to NOT specify its own Default Scene. Instead, it will refer to the Global Setting for DEFAULT SCENE (above).