I don't think so, I'm sure it's been like that ever since Universal Fluid Cells were in. At least ever since Thunderdark starting messing around with them anyway.
I recorded 2 videos to demonstrate this problem:
https://mega.nz/#!utgFmAYS!7Fm…BkftZN22KGy1NL-xFWBaZ7SQE -------> IC2-ex-485-picking-up-lava.flv
https://mega.nz/#!vgojzQJY!L8R…9mfeMBW34Xy5s25FLI6LiedAg ----------> IC2-ex-807-picking-up-lava(did a lot of clicking for the fisrt 15 secs).flv