What are you doing to train your bench? You use a lot more than just your triceps when you bench. You use your legs, triceps, lats, shoulders, chest, etc.
What set/rep scheme are you implementing in your bench training?
How's your shoulder strength? What assisting lifts are you performing to help increase your bench and get it back to where it was? Are you doing any CGBP, Floor Press, Standing OHP? How's your set up? Are you getting an arch? Are you driving your traps into the bench with your legs? Are you getting leg drive? Where are you bringing the bar down to?
One cue that will help you is... chest up. Get that chest up and that will help with your arch, help get some lat involvement, and keep your traps "locked" in place.