I seem to have encountered a situation where an svg image that I've created in Affinity Designer is rendered differently, depending on whether I open it on a Mac (which is the platform I'm using Designer on) or a Windows PC.
I'll attach two screenshots showing the difference. You'll note that the letter "S" in one screenshot (taken from the Windows PC) appears to have gone for a little wander. And this remained so, seemingly regardless of the Windows application I opened it in (I say "seemingly" because my tests weren't exhaustive, but I tried multiple browsers, at least).
Perhaps it's worth mentioning, too, that I only purchased Affinity Designer yesterday (again, that being the Mac version), so it could be that I'm missing something, but if so, it's not plain to me where I might have gone wrong. And indeed, nothing would have alerted me to the discrepancy had I not been switching between Mac and PC.
Anyhow, by all means let me know if I can provide more information. But at first blush, it does seem to be something of a bug.
PS: Also, if it helps, I was able to repeat the problem (ie, by exporting a fresh svg). And when I then tried exporting the image as a png file instead, the problem was resolved (ie, the "S" was aligned properly on my Windows PC).