Jack-o-lanterns placed high above do not shine after game loaded/sunrise events

Summary: jack-o-lanterns placed high above ground might not shine after game loaded/sunrise events, unless player approaches them close enough.

Longer description: in a superflat world:

• seed: -7038726043301780200
• world options: 2;7,33x1,2x3,12;2;stronghold,village,biome_1,decoration,dungeon,mineshaft,lake,lava_lake

there are desert temples rising high above the ground. I have replaced the orange cotton blocks atop a temple with jack-o-lanterns.

Problem (see attachment): when sunrise/game loaded event happens, the jack-o-lanterns on the south side (see the attachment; the character is facing south; the facade of temple faces west) do not shine.

When player approaches the lanterns (approx. 22 blocks or closer), the jack-o-lanterns 'turn on' and resume shining.

Other walls of the construction, where jack-o-lanterns are inserted, do not exhibit this behaviour.

Numbers:

• ground level: y = 37
• height at which (or above) jack-o-lanterns turn on: y = 59
• the lowest cotton block was at y = 67

Thanks.