Some transparent blocks have underwater animation of running water, but not all. For example: Ice block (Packed Ice and Blue Ice not!), Beacon, leaves, hopper, slimeblock, scaffolding. Glasses that are also transparent do not have this side animation.
Laying glass panes underwater also has an interesting behavior, with panes placed in a dug pit creating an air pocket.
By the way, the ice melts and disappears in the deep ocean over time, but I don't know if it's a bug.
Comments 3
Ok, this answers the problem with glass panes. Those animations of running water at the blocks over which they're visible are all right? If so, then it is inconsistent behavior.
Ah yes, that's MC-125351.
Blocks cannot be waterlogged by flowing water.