Hi!
Drawing using symmetry and mirroring works fine, there's a tiny bit of slow down sometimes, but nothing too serious. But drawing using only symmetry is a lot slower, to the point is almost unusable. I find it odd since I'd presume both functions would work the same. See the attached video for a visual sample of the issue.
Happens on an iPad Pro 9.7" (2016) with the latest iPadOS (13.3.1) and latest Affinity Designer (1.7.3).
Thanks!
RPReplay_Final1580374739.mp4