Mojang, with the new snapshot, fixed a bunch of unintended behaviour concerning observer blocks. This is a good thing as keeping unintended behaviours as features makes it harder to implement new changes.

However these unintended features gave the observer block amazing functionality. Having them removes makes observers so much less usefull. Mojang, now that you've fixed these bugs, please reimplement these quirks as intended features to the game.

Minecraft doesn't have to be consistent with the mobile port. Redstone is slow and unweildy in the mobile port, please don't make it so in Minecraft.