This one is actually backed up by a few studies like this [0] one. There's not enough studies to actually say conclusively that it's common or the usual cause,

This one is actually backed up by a few studies like this [0] one. There's not enough studies to actually say conclusively that it's common or the usual cause, but there's enough to suggest it should be under consideration. [0] https://doi.org/10.1111/ina.12042 https://doi.org/10.1111/ina.12042