can confirm for 1.16-pre2
[media][media]This bug is fixed. Still a problem with skulls water and lightning in 1.16-pre2: It's different now though. the water, signs and skulls always render behind the lightning, with other words they disappear when behind lightning. This bug is MC-44244
cant reproduce for 1.16-pre2
Still present in 1.15.
You can replicate through spamming fire while flying just above th ground in creative mode. You will deiscover some chunks let the fire go out, though the chunks around them think the fire isnt out, so the will keep showing the light of the fire. When you replace the blocks at the edge of the dark chunk the light will spread across the dark chunk. When you place blocks at the middle of the not present light sources, the light will dispappear
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The bug is also present in 1.15. Water is also affected: it can be seen in front of lighning though it should behind.
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bug seems to be fixed in 1.16-pre3, but MC-188203 seems to be occurring instead.