There are currently three issues with Ebony Maw.
The first issue is that Ebony Maw’s Ultimate ability is not showing all instances of his Heal in text-form. This is due to a text limit that can be shown over the head of the character’s at a given time. We have confirmed he is still doing the proper amount of healing with his Ultimate. We are currently discussing ways to make the healing more clear. Once we have an update we will let you know.
Second, Ebony Maw’s Ultimate, “Forced Transfusion”, currently has an issue where his drain stops as soon as a character dies. This is not intended and will be fixed by the end of the week.
Lastly, is that his passive ability “Envoy of Thanos” description states at Tier 5 - “Black Order and Thanos allies gain +30% Resistance.” That text does not match the functionality of the character and should read as “+10% Resistance” for a total of 30%.” The text will be corrected by the end of the week.
We understand that this might change your decision to invest into Tier 5 of the ability. Therefore, if you would like to have the ability set back to Level 4 and have the materials/resources returned to you, please contact Customer Support (Options Menu > Support) and they will assist you.
Thank you for reporting the issues, so we can address them quickly.