The circuit (in theory) outputs logic LOW when buttons are released and logic HIGH when they're pressed.
When I already ordered the PCB and assembled it (I know it's (a bit) stupid not to test this particular circuit before putting it all together...) I found out a pretty unpleasant thing: when for example SW3 is pressed the output on pin 2 is not 3.3V at all. It's only 0.90V!
At the same time the rotary encoder connected to another 74HC14 in the same way works somehow but the built-in switch also does not work (my guess it's just a capacitor discharge when the shaft is being rotated and MCU catches this noise as a valid signal).
What I did wrong and how can I fix it (if it's still possible)?