Honda CR-V right rear bulb works, but shuts off when I brake. Why? Wiring issue?

Honda CR-V right rear bulb works, but shuts off when I brake. Why? Wiring issue?

Added (1). There are two bulbs on each side that normally serve as red tail lights, and get brighter when you step on the brakes. Unlike the other three which do this properly, this particular one shuts off when you brake.

Bad ground