In some radius distancing lightning becomes invisible.
To reproduce it you can use a command block with /summon LightningBolt in and make a simple infinite redstone cycle connected to it. Then go away from lightning. it will dissapear.
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duplicates 1
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You're right, it's not an exact duplicate. However, can you provide some more details, like what is the exact radius that makes it disappear? Entities like mobs will disappear after a certain radius even though the blocks are still visible.
Ticket is still a duplicate just wrong bug.
Duplicate of MC-63640
Most likely duplicate of MC-44244, but ticket is very difficult to comprehend