Flow conditions executes TRUE, not FALSE

Question

CONTEXT

• Created small ticket submission system for a personnel office. Created ability to submit ticket on behalf of another user, such as by a supervisor. Needed one column "CUSTOMER EMAIL" to fill with the email from the actual customer so the system would have one column by which to email the customer.

If SUBMITTED FOR is full, CUSTOMER EMAIL should have SUBMITTED FOR EMAIL.
If SUBMITTED FOR is empty, CUSTOMER EMAIL should have CREATED BY EMAIL.

FLOW

PART 1 (Works fine)

• TRIGGER: Update item/File
• CONDITION: TICKET ID column field is modified

FLOW PART 2 (Problem)

• CONDITION:

• "Has Column Changed: Submitted for" IS EQUAL TO "Has Column Changed: Submitted for"

• Also Tried

• "Has Column Changed: Submitted for" IS EQUAL TO fx: TRUE

Boolean:::

YES

• UPDATE ITEM: CUSTOMER EMAIL (col) with SUBMITTED FOR EMAIL (field)

NO

• UPDATE ITEM: CUSTOMER EMAIL (col) with CREATED BY EMAIL (field)

The FLOW TEST says it works, but when FALSE, doesn't execute the NO "UPDATE ITEM".

Please help!

Answer 1

Found the problem:

In 2nd condition, was using "Has Column Changed:Submitted For" IS EQUAL TO fx:NULL.

But the value IS updated, even if the value is null, which produces a false positive.

Changed it to: "Submitted for" IS EQUAL TO fx:NULL.

My ignorance on difference between "Has changed" vs is the cell empty or not?