When training multiple sets to failure for a given exercise I’ve noticed a strength imbalance between my left and right arms on the final set or two, specifically in drag curls and incline dumbbell press. For example: when performing incline dumbbell press for 4 working sets @ 6-8 reps (0 RIR), on sets 3&4 I am able to stay within the rep range with the right arm but fail with the left 1-2 reps before the right hits failure. This also occurs on backdown sets and at higher rep ranges (12-15) for metabolic work.
I was wondering how to go about fixing this imbalance (for incline press specifically and just general exercises). Strangely enough, the opposite happens with cable lateral raises as my right delt hits failure before the left. Thanks for the input