Linear gradient bug

I’ve been working on a drawing app for iPad, and the latest update is linear gradients. I have an SVG output feature. Loading the output SVG file in Safari and Brave as well as Chrome on my Mac all look fine. However, loading it in Vectornator, it displays wrong. It’s possible I have an error in my SVG format. However, it’s very simple. I think it’s a bug in the way Vectornator is interpreting the file. How can I send a sample to Vectornator to take a look. This may be an opportunity to fix a bug.

Or does the app simply not handle gradients?