Since upgrading to macOS Catalina (10.15.4) I realized that Safari (13.1) can no longer render my lovely black truck(⛟). If I inspect this element in the developer console or copying the character into the url bar, everything is rendered perfectly fine, but in the web view, I only get the white square displayed. The same problem exists on 2 other Catalina machines, but not on the 10.14 and 10.13 Safaris.
How can I fix this on Catalina?