Canvas is not showing text with correct layout. However, the preview version is perfectly laid out. See attachments. You can see my text settings for both sections are: Line height=1.2 and Space before = 10 px. This discrepancy obviously makes layout design tricky!
A few points to make. I have a 2020 iMac using Catalina and I only cater for desktop PCs/Macs; that is, I am not bothering (currently) about the view from tablets or phones. I have tried restarting Sparkle and restarting my Mac. Problem has, I think, only occurred since v3.0.3 update.