You cannot change the intensity by just adding/changing numbers. You have to completely retype the entire value.
Found in 4.21 CL# 4613538 and 4.22 CL# 4681912
The value will return to 300
The value would change to 200
Delete the entire value before inputting the value you want
There's no existing public thread on this issue, so head over toAnswerHub just mention UE-68074 in the post.