No crosshair on some non-living entities in spectator mode

Confirmed for 1.8.

Confirmed for 1.8.1-pre5.

Confirmed for 15w47b

Confirmed for 16w15a and 16w15b

Please link to this comment in the description

The following is based on decompiled version of Minecraft 1.9 using MCP 9.24 beta. All method and class names are the names used in the decompiled version.

The reason why this happens is because the method net.minecraft.client.renderer.EntityRenderer.getMouseOver(float) only sets the field net.minecraft.client.Minecraft.pointedEntity to the value of the field net.minecraft.client.renderer.EntityRenderer.pointedEntity if this.pointedEntity instanceof EntityLivingBase || this.pointedEntity instanceof EntityItemFrame. However the player can spectate all entities that are valid values for net.minecraft.client.renderer.EntityRenderer.pointedEntity. Removing this requirement should solve the problem.

Confirm for 1.9.3 pre-2

Confirmed for 1.9.4

Confirmed for 16w20a

Confirmed for 17w15a.
Also crosshair does not appear on Ender crystals and painting.

Confirmed for 1.13-pre8

Confirmed for 1.13

Confirmed for 18w30b

Confirmed for 18w31a

Confirmed for 18w32a

Confirmed for 18w33a

Confirmed for 1.13.1-pre1

Can confirm in 20w51a.

Can confirm in 21w13a.

Can confirm in 21w17a.