The orientation of beds in the Nether has an effect on the strength of the explosion resulting from attempted usage.
In the attached images, a bed was lain in each of four possible orientations on both netherrack and nether bricks. As sunflowers will point to the Nether's East, they are included in each frame for reference.
The netherrack test was followed by a secondary set of bed explosions of the same orientations, which shows a consistency.
Results (direction is that faced by head of bed):
East: small explosion, significantly less fires started. Deals only 1 health point of damage.
West: large explosion
North & South: small explosions
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Comments 8
"Beds placed in the Nether or the End will explode when the player tries to sleep, and set fire to surrounding blocks.", thats what Minecraft Wiki says. I think the bug (according to the screenshots), is that there is no fire when a bed explodes in the nether.
@Luis Robles Fire is still spawned for me, try testing.
The explosions seem comparable regardless of orientation in 0.14.3
Tested further using a cobble as it has a higher blast resistance. I can confirm that the orientation does make a difference as the op stated.
I can't reproduce this on 0.14.0 iPhone 5s iOS 9.3. All the explosions are relatively the same size.