Why is the TPMS saying my tires are low pressure?

The screen behind my steering wheel started saying my back left tire was low and slowly the rest have started flashing as low as well. I have checked the pressure many times and one was a bit low but within the acceptable levels. I deflated them all then reinflated to the psi noted on the inside of the car door but the alert still shows.

This is becoming annoying as other information such as mileage and fuel levels are hidden because of this alert. Any advice is appreciated. Thank you.