Walls joins incorrectly after mirroring across a nearby line

Someone sends me a file with the following issue.

Two walls join incorrectly after the Mirror command and vaUpdate cannot correct them. vaFillet with a radius of 0 can correct the issue but it seems a little bit complicated.

Tested with & Rhino 7.15

test.3dm (6.0 MB)

Hi @gankeyu thanks for reporting this. We will revise it. You can manually fix it by pulling the mirrored wall end point. Check gif below:
wall mirror

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