No hunter would choose rasperries over meat. You maybe eat some while hunting, or after the hunt failed. But collecting rasperries and hunting requires very different equipment. You wouldn't risk loosing 100kg of meat because you found 50 g of rasperries.
(Rasperries take a lot of time to collect, hard to transport in meaningful quantities and go bad very quickly. If we are talking about ancient hunter tribes - children with women would be the ones doing rasperry picking close by while the men go further away and then carry the meat back to the camp)
Hunting is also a high risk activity - you sometimes don't get anything. Thus some ancient tribes would choose to pick the raspberries - which is to say abort the hunt to bring the women and children to pick with them. Others would turn back to get the women and children and then go on with the hunt. Still others would just go on with their hunt without telling anyone.
The rasperries won't go away if you spot a good patch while following the game.
In either case, the goal would still be to get food.
a lot of hunting isn't following game, it is search for game. If you have game in site that changes the calculation again.
Yes, in ancient context it is search for game - but that means searching for fresh tracks. And when you follow fresh tracks, you don't stop for rasperries until the track turns cold. It would be distracting and like I initially said, only to be considered if the hunt failed (meaning no signs of game at all)