I grew 5 PotG from seed and did not have stretching until I flowered.
Check my diary out of ya like..
It does have a strong lateral branching trait.. so a lot of those side branches maybe just were reaching for light? If you’re light is not intense enough or close enough that could be what’s going on.
Most of mine did have a lot of space between nodes when it flowered.. and it had plenty of light so it’s partly genetic I believe.
I’d tie those branches down with ties / do some LST to make sure they’re getting plenty of light.
Good luck and this is one of my fav strains ever. Enjoy!