Two engines , two Orion xs , one house battery - how to get both to charge at same time

Marine application. 2 alternators 150 amp one per engine. Each engine has its own starter battery , separate house battery about to be smart lithium. Installed 2x Orion 12v 50 amp one per engine battery bank. Connected to Cerbo Gx. Each works to charge house battery independently, but if both engines running only one will output charge. If other engine stopped, will restart charge output.
Is it possible for both engines to charge house bank at same time?
Software Orion 1.08
Cerbo 3.60 ~17


Moving from beta. While this is running on a beta, this is a general use question.
If you suspect this is beta specific, please test on a production version first to verify. Thanks.