Section View - Edit Cutting Line bug?

I'm currently using SW 2018 SP5 & just came across an odd bug.

When you create a Section View, you can R-Click it & edit the Cutting Line.

From there you have the option to edit the section view sketch if you wish.

Now, if you edit the sketch & return out of it, when you R-Click on the Cutting Line, you no longer get the option to Edit the Cutting Line?

Where's it gone?? Does anyone else get this & if so, is there a way to bring it back or edit the cutting line again??

Thanks.

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