2planks and the reverend
Google ECAM Warnings for Airbus
Basically EVERYTHING is monitored by FADEC/SDAC ( Google is your friend 😃 )
The lower central tv screen will show a warning and identify Eng 1 2 3 or 4 as in a stalled/reversed airflow condition and this is a pilot memory item to clear the stall in the engine ( thrust levers to idle/ as appropriate )
It is possible to aerodynamically stall a modern Airbus but that is not what happened here and would require a PowerPoint Presentation to explain🤓🤓
So basically engine airflow was disrupted and this can cause airflow reversal which causes the flame. Imagine your Lamborghini Aventador spitting flames out of its exhaust 🤣🤣🤣