USB-C to 3.5 mm Audio jack for wired headphones

Hi everyone. Recently upgraded from Fairphone 3+ and realised that there is no headphone jack. I asked to be notified when this is back in stock. While I have been waiting for it to come back in stock (Adapter USB-C to Mini-jack - Murena - deGoogled phones and services) I purchased a cheap one from a bargain store for £2. I thought this cheap version was faulty, because on plugging it in to the USB-C port music would play at about 30x normal speed before playing the last bit of a song at normal speed. I discovered that this is mitigated by ensuring the phone is switched off before it is attached. Is this the same process for the official accessory?

Regain your privacy! Adopt /e/OS the deGoogled mobile OS and online services