This is why, with any dog, you need to be really careful about breed co-efficient and socialising. I'm not saying this is the case with the above one, but too closely bred dogs have a tendency to have unpredictable temperament issues.
Socialising: our current goldie is a gorgeous but very sensitive working line pup and her socialising was sadly interrupted due to the first, very strict, lockdown. She was around 8 months old and unfortunately had a bad experience with a small boy at the very start of the lockdown. No malice, he just suddenly ran at her screaming and waving his arms, lasted a few seconds but it terrified her, at a time when it was impossible to undo the damage effectively. It may have coincided with a fear period but for a long time afterwards she was scared of 90% of what she saw out on walks. She was happy, playful and confident with children and other dogs before that experience.
She's NEVER bitten any person or dog, ever, and is now (after years of hard work desensitising her) lovely with all adults, with kids she knows and chilled with most other dogs. But, she can still be reactive and scared with children (and puppies- the same energy maybe) that she doesn't know, so we will always have to be very, very careful around children, especially when out in public. We will never allow her to be close to an unknown child unless she invites it herself AND she is wearing her muzzle, which feels tragic after knowing how chilled and gentle our previous pet goldens were. People see a goldie and think she's a touch toy for their child, so we have to be very vigilant and sometimes very firm. A reactive dog is not easy to live with!
We adore her and she's a typical soppy, loving dog at home, but it makes me really sad to see her looking longingly at children from a distance but cowering and backing off if they are too close (plus, a scared dog is a dangerous dog and they're not small dogs).
Our experience was just really, really unlucky, but I'm sharing it to emphasise how important good, consistent socialisation is and that as novice owners you need a great breeder who can give good advice if you have questions or are struggling with any aspect of raising your puppy.