When in spectator mode, you can see that the bottom face of the torches on repeaters is only culled when the torches are lit. This also applies to the bottom face with the bedrock block texture that appears when repeaters are locked. I expected these bottom faces to never show up since you can never see them unless you're on spectator mode. The same thing happens to comparators.
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Duplicate of MC-159201

I don't think it is a duplicate of MC-159201 as I'm stating the total opposite. The faces should be removed, not added.
Even though that is true, this is still a duplicate. Mojang will decide what happens to the torches based on that original report. Having two reports suggesting opposite things to change about a small feature is very unecessary.

You're right. I didn't think of it that way, sorry.
I've edited MC-159201 to make it a bit more neutral on the matter.
Relates to MC-109087