It is hard to follow your resistor chain for your two sensors.
You've got R7,8 pullups. Where do the lines go from there up and to the left of your schematic? And down to the bottom of schematic.
You have R1,4 pulling down at same time.
You have R2,5 serial resistors.
Then you have R3,6 pullups again.
What is that all about?
What are your sensors?
I assume it is a 5V device and that is why you are trying to do level shifting with R2,R1 and R5,R4.
But then I assume they have open collector outputs and that is why you are using pullups R3,6 to 5V.
If they do have open collector outputs then they do not need pullups to 5V, just to 3.3V. And therefore you don't need to attempt to do level shiftingl
But, I would really need to know what are your sensors to say for sure.
And for the lines going off the image to the upper left and down below, I assume those are I2C circuits. Those will not be compatible with what you are trying to do for your open collector sensors which I assume, based on your sketch, are pulsing type sensors.