Yesterday I came across an issue reported on Reddit. In the discussion thread it was mentioned that LSPosed modules cause QA to crash. On my device I can also reproduce these steps. This is similar to the issue I reported a few days ago #405, however, it behaves differently and does not appear to be caused by libpairipcore.
So I believe it's not a duplicate of #405.
Install Qatar Airlines app.
Apply any module to the app. (No reboot needed.)
Run it.
I tested the four modules for the app and applying any of them causes the QA app to crash.