Observer locks/freezes when pushed into spaces with various scheduled block updates

When you place observer on the flowing water....observer texture will stay on the 'on state'

How to produce it:>

1. Place water and close it with building block

XXX
XOX
XXX

X= Building Block
O= Water

2. Break one of the block to let the water flow

3. As soon as you break the block, place observer

4. Observer will stay on the 'On State'