It’s really bizarre isn’t it? And all the mixed communication is just leaving the door open for all sorts of unhelpful but understandable speculation about what the actual problem is.
It's not helpful for the fans, which may actually help facilitate additional pressure behind the scenes based on the conjecture. However, maybe there is a reason.
I have a sense they're aiming to protect Dom and allow him to finally return without this overarching fear that he'll be in the injury time within a short period of time.
It's of course all hypothetical, yet the likely options are is that a date hasn't been set because they're aiming to bring him back to full fitness - not rushing him.
We know how this has panned out in the past when he's been rushed back for a certain fixture, carrying a niggle/injury or not being able to full recuperate.
Not setting a date may mean they can work at a more realistic pace without a set deadline; it may take a while, or he may surprise us all and come back sooner.
Fewer expectations and more flexibility could help his recovery. Or, based on previous comments he's made, it could be an issue with his mental health.
In this situation, setting a date is the very worst thing you can do, as it's not something you can predict - you need to work with the person and it may take time.
Furthermore, it might be a combination of the two: the injury isn't healing as he may desire, which is putting additional emotional strain on him. Alas, cyclical!
Many years ago, I suffered a relatively serious injury and while the body was healing, the emotional strain on me (usually a resolute person) did take a toll.
Anyway, it's all conjecture... we've just got to hope and pray that he returns sooner rather than late, but importantly when he's fit enough to do so.