For example, WeChat browser can open a beta.11 flarum perfectly, but opening a beta.12 flarum will report an error.
I know that dwelling on whether or not flarum is compatible with old browser kernels, is a lot like picking a bone in the egg (after all, they're obsolete).
But it does seems beta.12 has lower compatibility than beta.11, so lets just discuss what changes might causes that?
↓【100% pure original beta12, no third-party extensions】
↓【Beta.11】