Water doesn't flow when on top of empty waterlogged blocks

Water also does not flow off of signs, fence posts, or ladders.

This actually got fixed; just checking up on already wrong ones will not work, as it doesn't get updated; putting water down will make it flow now.

Maybe this is working as intended, but certainly it is not a desirable behavior for anyone that builds mob traps.

The following pics show water behavior using signs. This extends to many other blocks. as other have posted.

1. Place sign, click the sign with water. Result: Sign becomes water logged.
2. Place sign, click above the sign. Result: Water does not flow. Old behavior: water flows "over the sign"
3. Click click the sign with water. Result: Sign becomes water logged. AND water, from step 2, flows "over the sign"
4. Break the sign, Replace with solid block to remove water, break solid block, replace with sign. Result: Sign replaces the water.

This behavior, while inconsistent and confusing, does leave a way to still use signs to block water in mob traps, but the procedure is now different. Get the water flowing first THEN add the signs below the flowing water.

This issue is not resolved. testing in 18w19b shows that water continues to remain stationary on top of fillable blocks like signs, bars and slabs.

EDIT: placed in 18w19b.

Agreed, this is still happening in 18w20c.

Can also reproduce. Reopening.

Confirmed in 18w21b

Added a screenshot (above) with a single water source block over a number of blocks from signs and stairs to chests, also some examples of waterlogged versions of the same also not flowing.

Still occuring in 1.13-pre1

Affects Version Minecraft 1.13-pre2