[Bug] Enabling Options Can Cause "Mapping Tokens" to Freeze

Enabling “Highlight Word Correspondence” in Learning Modes (maybe also need to check other options as well) triggers a “Mapping Tokens” issue, causing the page to become unresponsive. And when I refresh the page, it doesn't save the previously selected option. Currently on Netflix, but would be great to check them on other platforms as well. Also I’m using Chrome.