Three things you need for successful lifting & breaking plateaus.
Why is stability about mobility?
Simply because if you’re not stable your body will naturally inhibit the ROM you can achieve because it is unable to fire its neural pathways in the required sequence.
Mobility is before strength due to the fact that to lift heavy things pain free and reduce injury you need good/optimal mobility.
If you ensure you have stability/mobility then your strength will progress. When you start to find yourself stalling take a look at the first two because the chances that one of them is now being compromised to try and accommodate a heavier load is high, meaning you might need to sort them first.
What is meant by Strength A & Strength B?
A – Overall strength to perform the movement while keeping optimal/correct form/alignments.
B – You have a weak link in your muscular/kinetic chain that needs individual/specific focus (such as spinal erectors in the front squat, triceps in the over head press, etc).
Take a look at all of your lifts, if they stall go back and from upwards from stability until you find the weak link. If you do this you will find you break lifting plateaus and also better understand your own body.