Seems like it's not a bug, it's a feature 🇺🇸

"Basically, Texas has its own grid to avoid dealing with — you guessed it — the feds. But grid independence has been violated a few times over the years — not even counting Mexico's help during last week's blackouts."

https://www.texastribune.org/2011/02/08/texplainer-why-does-texas-have-its-own-power-grid/