Siemens Graph

Good evening, I have an odd confdition occurring in a sequencing program that was written in Siemens Graph. I am fairly new to Siemens, but after reading the programming manual it is my understanding that when a step is active and the interlock condition is true the tag assigned as an output should be 1. I have a step that occasionally becomes active with a true interlock and the output doesn't go to 1.

Is there a scan issue or could there be logic elsewhere stopping the sequencer from running? I have attached a screenshot of the condition.

Thanks
Brad