Does the description "minor by custom," which does not invalidate ablution, apply to my sleeping in the car for an hour or more?

What he attributed to the Hanbalis is correct, which is that the sleep of one who is sitting or standing does not invalidate ablution if it is considered light by custom. Sleeping for an hour or more in a car is considered extensive sleep and invalidates ablution according to the Hanbalis. However, the preponderant view with us is that sleep does not invalidate ablution if the person has firmly placed his posterior on the ground or similar, even if the sleep is long and overcomes the mind.