iOS 13 ships with an update to Safari that causes the browser to crash on selected iOS devices when using the Scandit SDK for the Web. We introduced a workaround in version 4.4.0 of the Scandit SDK for the Web to avoid these crashes.
For more details, please read the release notes. We encourage you to update as soon as possible by deploying the updated latest SDK for the Web release. If you are updating from a version older than 4.0.0, please have a look at our migration guide.