Reflection Captures show static lights with "Actor hidden in Game" checked.
Found in 4.19 CL# 4033788, 4.20 CL# 4233996, 4.21 CL# 4247867
The light is captured in the reflection capture, and shows up in the reflective plane as a white bar
As with Stationary Lights and Moveable Lights, the light should not be visible in the reflection capture when "Actor Hidden In Game" is checked
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-62433 in the post.