Thanks for posting this question! I have had similar issues recently so definitely will continue following this thread. I can say that last year I didn’t have any issues taking on as many carbs as I wanted. This year after a few months off (I know, too long) I jumped right into 90/hr and had similar issues to what you are talking about. I backed it down to about 60/hr and I haven’t had the issues since. Maybe try lowering the amount and see if that helps? I plan to start increasing slowly over the next few weeks/months and am hoping to get back to 90+.
Not to derail the thread, but side note - Have seen quite a few posters talk about sugar and the downsides on your dental health in this thread and others. To me it seems that as long as you don’t let it sit on your teeth afterwards it shouldn’t be a big deal. Its detrimental when it is allowed to hang around and aid in the growth of bacteria. I confirmed this with my dentist but would be interested to hear if anyone has better info than what my dentist has shared. Their only feedback was to rinse your mouth out with water after taking in carbs and also brush after workouts.