I've heard about the infinity react being good for both support and cushioning. Ben parkes did a decent review on his YouTube channel recently. You say you've always ran this way and even walk like that so that's a long time i would bet something is tight and something is loose. A good physio should help. My issue was imbalances causing bio mechanical changes and yours could be your natural mechanics causing an imbalance. Have you had a professional opinion on this? Otherwise orthotics in a neutral shoe should help as they'll compensate plus the fact they will raise your foot in the shoe slightly due to the added thickness this should help with getting a good lockdown and should prevent the shoe sliding under foot.
I've heard about the infinity react being good for both support and cushioning. Ben parkes did a decent review on his YouTube channel recently. You say you've always ran this way and even walk like that so that's a long time i would bet something is tight and something is loose. A good physio should help. My issue was imbalances causing bio mechanical changes and yours could be your natural mechanics causing an imbalance. Have you had a professional opinion on this? Otherwise orthotics in a neutral shoe should help as they'll compensate plus the fact they will raise your foot in the shoe slightly due to the added thickness this should help with getting a good lockdown and should prevent the shoe sliding under foot.