I enjoy the feature where you can set traditional characters to appear just above the simplified chinese characters. This feature (nor the pinyin version of it) does not work on my version of the android app. I just downloaded it and am running android 9. In the meantime I’ve been just using google chrome to use Lingq on my phone, and it sucks compared to the app, but I value having the traditional characters displayed. I assume this is a bug, hopefully it will be fixed soon!
For now alternative scripts on the app word on blue and yellow popups only. After our update to LingQ 5.0, it will be available for a lesson text too.