SAPMHTTP wait time

Hello

We have an ABAP system, and its main usage is webdynpros.

I was checking ST03N -> Transaction Profile -> Standard

Task Type HHTP

Here I see that SAPMHTTP is the top process in terms of #Steps

Also i see that average times for this process are good, except wait time which is 963,4. Average time is 1.153,5.

I have seen SMICM, and peak times are far from Maximum.

My question is what can be causing this wait time.

Thanks