I add a pinch of salt to my sugar water. Try that to see if it resolves your ‘race bladder’ issue.
I find it improves the taste, and it’s got to help with salts lost through sweating.
I’m sure that there is a more scientific approach using a wider range of electrolytes rather than simple salt, but cheap sugar/salt/water works fine for me. I’m not being paid to ride a bike, let alone being paid to win, so I don’t see the point in getting too obsessive about it all.