@Muddy Cyclist I have found I get phases of higher or lower bg. The stress of previous days that caused the rise will reset itself but maybe not today. Dont know if that helps but enjoy your bike ride and try not to worry. Best wishes.
Think you are bang on the money, @PenguinMum
.. It must be a little skittish,. When it gets a jolt to the system, kind of like just after an earthquake I imagine, where it stays outside and takes precautions rather then risk not being prepared.
I too think it takes a little time to be confident it's not going to happen again so soon.
I'd say give it a day or two @Muddy Cyclist