flying machine starts upon chunk loading

When I enter the area where my semi-automatic farms are, either through a nether portal or via flying there with Elytra, the flying machine of my sugar cane farm starts, although it is set not to start without pushing a button.

Steps to Reproduce:

1. approach flying machine from several chunks away (does not work if I just move away a few chunks.

Observed Results:

Flying machine starts without pushing the button as it would normally be required

Expected Results:

Flying machine should not start without pushing a button.