Expanding stroke breaks corner

[Andy900]

When expanding the stroke of my drawing, one of the corners break.

I've attached images. The first image is before the stroke is expanded, the second one is after.

Why is this happening?

[Alfred]

Images show us what is happening but they don’t enable us to investigate the cause. Please attach your *.afdesign file.

[Andy900]

Just now, Alfred said:

Images show us what is happening but they don’t enable us to investigate the cause. Please attach your *.afdesign file.

Here's one file from before and one from after expanding the stroke.

Before.afdesign After.afdesign

[Alfred]

1 hour ago, Andy900 said:

Why is this happening?

It’s happening because the stroke alignment is set to ‘Outside’. The problem is less evident when it’s set to ‘Centre’, but it only goes away completely when it’s set to ‘Inside’.

[Andy900]

1 hour ago, Alfred said:

It’s happening because the stroke alignment is set to ‘Outside’. The problem is less evident when it’s set to ‘Centre’, but it only goes away completely when it’s set to ‘Inside’.

Hmm... Perhaps it's back to Adobe for me yet again  I keep trying the Affinity stuff every year or so to see if they're catching up, but I keep running into very basic things like this not working properly. Maybe next year, huh?

Thanks so much Alfred for figuring this out!

[lepr]

6 hours ago, Alfred said:

It’s happening because the stroke alignment is set to ‘Outside’. The problem is less evident when it’s set to ‘Centre’, but it only goes away completely when it’s set to ‘Inside’.

It's happening because there is a pair of coincident nodes at the corner which becomes funky. Delete one of the nodes and then Expand Stroke gives a reasonable result.

[Old Bruce]

2 hours ago, anon2 said:

It's happening because there are a pair of coincident nodes at the corner which becomes funky. Delete one of the nodes and then Expand Stroke gives a reasonable result.

Arghh, I know I checked there. Obviously not closely enough. Great catch.