It is just a switch with LED's
It pulls the IO line to 5v or 0v. So you don't need pullup resistors enabled, but having then enabled wont cause an issue either.
If you inverted the logic and it was stick on triggered it should then be stuck on open.. so that doesn't make sense....
Test your endstops with this test firmware [github.com] enable serial monitor in arduino/vscode at 9600 to see what is going on.
It pulls the IO line to 5v or 0v. So you don't need pullup resistors enabled, but having then enabled wont cause an issue either.
If you inverted the logic and it was stick on triggered it should then be stuck on open.. so that doesn't make sense....
Test your endstops with this test firmware [github.com] enable serial monitor in arduino/vscode at 9600 to see what is going on.