TOTK Mystery: Why is the master sword beeping/flashing?

At a very specific spot in the depths (around 0006, -1470, -0468), the master sword flashes and makes a sound if I walk north or east.
Does anyone know why this is happening? Is it happening to any of you?

[@duck_o_web]

Usually the master sword glowing just means there is a gloom afflicted enemy nearby. Checking your location on an interactive map online shows there is a Hinox north of that location. It might be that, or there are other hidden enemies (like stals) around there.

[@arctangent2237]

Wow, thank you. That explains it. There were two stone pebblits nearby.