Russki, you seems to be having exactly same question that I posted here before.
As you can see from my previous posting, it was clearly mentioned before at the website as following.
You must currently hold either:
1) a skilled visa (487, 489 or 495)
2) a Bridging visa A or Bridging visa B that was granted in relation to an application for a subclass 487, 489 or 495.
You must have held a skilled visa at some time for at least two years before you apply for the visa.
In this sense, we can find out that we must hold 489 visa for 2 years before applying for 887 visa.
But, now the immigration website removed the term of a "skilled visa", instead they used "eligible visa", And the bridging visa A is also considered as eligible visa.
You must have held an eligible visa for at least a total of 2 years before you apply for a Skilled Regional (subclass 887) visa.
And they also change some words from at "some time" to "total of 2 years" which might be implying the both bridging visa and 489 visa.
Thus, it has created more confusion and there is no available explanation about this change at the website.
I sent inquiry about this to Iscah which is one of the most famous migrate agent, and they reply me that it just a word change and 489 bridging visa time does not count for the 2 years residency requirement.
However, I still believe that there must be a reason for this change and the agent of my friend is 100% sure the bridging visa time is also counted in the 2 years residency.
If there is only 2-3 months gap, I would apply later rather than taking a risk, but as I mentioned, it is a 7 months difference for me, so it is very important matter to me.
Anyway, we can see some cases in the sooner future and will decide how to go with our applications.