It is true, because the
OP has clearly stated and linked the 'BT adaptor' purchased, which is only for windows or android clearly stated on the website. Let's not add any confusion here, apple need not apply.
I didn't need any rebooting on android or windows 10, and forscan never picked up the correct device, not till I dropped down the options box only to now see it in the list to select it. Same on my laptop had to pair it to the laptop then have forscan select it from the list.
I don't know what apple do it's not the OS of choice for me because of the walls up approach, and premium sticker price of suitable quality devices.