The huge variability in quality of lithium batteries for smaller emobility devices may contribute. Scooters and ebikes are burning down houses frequently enough for fire departments to be warning of the risk.
BYD hybrids are notorious for catching fire, as are some of the EVs LGChem supplied batteries for.
These are hopefully just teething problems of an industry rapid developing.
For stationary storage, LFP chemistries are extremely safe.