DLA ending soon

My DLA is due to end in less than 3 weeks and have not heard anything from PIP.
I posted my form off at the start of June and got a message saying it had been received, since then, nothing.

Is this common?

PIP applications are taking a very long time at the moment! As long as your PIP forms were received on time, your DLA claim will continue until 4 weeks after the PIP decision.