A door knob lock button stuck has a few quick fixes that you can try out.
Thumb press door handle sticking.
Release the button quickly try sliding your finger off the button so the pressure is maintained up until the precise moment of release with no backing off.
Once you let go of the knob grab the end of the latch bolt with your fingers and pull.
Squirt the bolt with graphite powder.
If the latch bolt moves it is sticking in the door knob and requires some disassembly to fix.
If the latch bolt doesn t move and is fully extended the issue is with the strike plate.
Remove the cap on the graphite powder.
Turn the knob to open the door and release the knob slowly.
Push and hold the button in.
Open the door and squirt graphite powder into the key lock.
This is because the issue is not with the door and not even with the control the knob has over the stuck latch.
The issue a door latch stuck due to a jamming latch will have no real variation between how the latch moves when it is pressed in or when the handle is turned both when the door is open and when it is shut.
Turn the handle of the doorknob to expose the bolt.