DAC disabled after reading values from ADC

I'm trying to keep the DAC active while reading values from two of the ADC channels but the DAC is disabled after each read.
Is it possible to keep the DAC active while reading values from the ADC with the PCF8591 ?

Start by reading the library's ADC and DAC read paths and compare their behavior with the PCF8591 device requirements. Determine whether the DAC can remain enabled while reading two ADC channels; done means the supported behavior is established and, if applicable, the library or its documentation reflects it.

Written by the indexing model from the issue text.