Tempo button is OFF.
This sounds odd. If you tweak a delay parameter and power cycle the pedal, your setting should remain the same as long as you don’t load a preset. Are you incorporating any type of MIDI in your setup? Could an external controller be sending these parameters or clock changes? If not, check to make sure MIDI Clock is set to “OFF.”
It is possible that more than one function is assigned to your aux switch. Go into the System Settings > Auxiliary switch mappings and make sure that only the function you want to control (hotswitch) is mapped to the Switch. Page 42 of the manual indicates all possible parameters.
If you disconnect this switch, do you still notice the erratic behavior?
You shouldn’t have to ditch the aux switch. TS will work fine with a one-button switch but since the pedal takes 3-button switches, TRS is crucial for that. You still need to make sure multiple parameters are not mapped to TIP in the aux switch assignments.
Just checking – are you sure the aux switch is hooked up to the aux switch input and not the expression input by accident?
Not likely, but it wouldn’t hurt to isolate the Space by using the factory power supply to make sure power isn’t, in fact, the issue. Space works best at 9V 500ma Center +
Your firmware version should be 5.2.0(6). However, it is not uncommon for things to get corrupted. Sometimes reinstalling firmware and conducting a factory reset is the quickest solution. Always backup your presets and system settings before doing this.