Sneaking doesn't work in some cases

Sneaking seemed not to work from blocks to repeaters, unlike for rails (which have a hitbox too)

What I expected to happen was...:
Sneaking would prevent player from falling from a full block to a repeater.

What actually happened was...:
I fell.

Steps to Reproduce:
1. Place a block (I tested with sandstone, off piston, and redstone block)
2. Place a repeater / comparator (powered or not) on this block's side
--> Note : I tried with rails but it didn't work
3. Walk on the block (when you are on the repeater, you have to jump to get to the top of the block)
4. Sneak to the edge of the block
5. When you are at the edge, you fall on the repeater, whereas you shouldn't (I think)

Note for Mojang
Because when you walk straight from the repeater you don't get directly to the top of the block (as for slabs), I thought sneaking would prevent me from falling ; anyway, this may be a "work as intended" ticket.

I looked for this bug in the search engine, but didn't find it (maybe MC-58959 ?). Maybe it's duplicate, I don't know. Sorry if true =)

\/ All these "worked" (from on of these blocks to the comparator / repeater next to it)