My bench press is the weakest of all 3 lifts and it tends to fail in the middle portion of the lift.
I have no problem lifting it off my chest or locking it out. But if it fails, it fails in the middle ROM.

So guys, any assistance exercise(s) that I can do as a recommendation?

Thanks in advance!

u mean u fail to go all the way down touching ur chest? lift lighter go full rom. but weight shud be challenging for the last 2 reps.

Lift the weight u can control not what you can for few reps den fail behind

Unless you got some1 supporting you then different story

Probably just weak chest. Work on building more chest muscles will do. If so, try adding some chest fly.

But most of the time, many people are just weaker at whole bench press. I wouldn't even worry about any specific weakness yet without knowing your current lift. Might be your programming, might be your diet, might be other thing.

throw in some triceps exercise like cable pull down, skull crushers....

get them triceps strong and you will hit your reps and pr.

Go lighter

I go all the way down when and pause for 1 second (following the IPF rules). What I mean is how do I increase my benching weight when I hit a plateau and I'm stuck at the middle ROM when going up ?