I ran into a fully lit nether portal while exploring my survival world.

Before you ask, I can absolutely assure you I didn’t light this. It’s 5 by 5, naturally spawning. That’s fine, what concerns me is how on Earth it’s lit?

Is there a special thing for this to occur like a lightning strike? I feel like the chances must be incredibly slim.

This is the latest Bedrock version, and I’ve never discovered this before.