Is it possible to turn this functionality off when using Omnichannel?

Inactive messages in omnichannel routing

An inactive messaging ticket (more than 10 minutes without a reply) is automatically assigned to an agent with spare capacity on a round robin basis. It won’t use up any of that capacity.

Once an agent comes online, assuming they are not at max capacity, they will be automatically assigned an inactive message from the queue without needing to accept it. If there are several inactive messages in the queue, then the first agent online in the group will be assigned them all. If more than one agent comes online at the same time, the inactive tickets are assigned starting with the agent who’s gone the longest without any messages.