come on lets back on the centre line. It might make a good bedtime story talking about losing VS etc. but its unfortunately bull!!!!.
The loss of a VS would produce many more faults than you have here, many more.
Once again acars is only a messaging system. It doesn't produce any messages it just sends them. The messages are aircraft system time stamped and not acars time stamped.
What we clearly see with these messages is the beginning of a sequence of tragic events tied to air data but still for reasons unknown.