SW Prompts 3 times before giving me the option to discard changes

I come from a background of years of Pro/Engineer use, so I always have SW set to require fully-defined sketches.

Occasionally, I sketch something and decide to discard it, but, instead of pressing the red X, I inadvertently press the green tick.

SW, as I would expect, then informs me I need a fully-defined sketch.

I would then expect to be able to click the red X and carry on.

However, I click OK, and SW tells me a further twice that I need a fully-defined sketch before offering me the red X option.

Why prompt me 3 times?

Have I got something set incorrectly?

Or is this intended functionality?

SW2014, SP5 and SW2016, SP3

Regards,

John

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