F3 + C is supposed to do that (After 6 seconds of holding them both down)
F3 + T is supposed to reload all texture, sounds and web-loaded client resources.
I'm not a mod or anything but is your computer strong enough to run the reloads?
I do not use any resource pack, and the bug is still going today.
It was always like that..
When you break it the particles appear on the side you break it from. Upon breaking, particles will emit from the block itself and the block will drop