A high-hydration recipe requires flour that can absorb water and build a stable gluten network.
Protein percentage can be a useful guide, but it does not tell the whole story. Two flours with the same protein content may behave differently because of the wheat variety, milling method, age, and quality of the flour.
When the flour cannot support the amount of water in the recipe, the dough may remain sticky and weak. It stretches a little, then thins and tears. After each fold it appears stronger for a short time but soon spreads across the bowl again.
Instead of adding extra flour during bulk fermentation, reduce the water slightly the next time you make the recipe. Holding back 20–30 grams of water for every 500 grams of flour can make a noticeable difference. Add that reserved water only if the dough develops enough strength to accept it.