Normally, placing redstone will slightly raise the brightness of the block you place it on. However, when using a potion of night vision, this effect is reversed, and the brightness decreases slightly.
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Please provide some screenshots of the issue.

Cannot reproduce as per screenshots

Read this as redstone torch, but tried again with powered redstone as well and was still unable to reproduce.

Tried it again, but may just have to be on compact blocks next to another light source, such as lava or a beacon. Also, the potion of night vision has to be thrown first.