When I joined a server recently, the blocks fluctuated a lot and looked like the pictures below. It appeared that entities weren't affected. Completely restarting Minecraft fixes it, but if you disconnect and reconnect again, it happens again.
To reproduce:
1. Run Minecraft version 1.9 or newer
2. Join any server
3. Disconnect from the server
4. Join any server to see results below
Environment
Windows 7, Java Version 8 Update 74 (build 1.8.0_74-b02)
See MC-62958.