TCAS is fed air data information from the ADIRU's. If you already have faults or issues with the ADR part the data bus going to TCAS will log a fault.
Once again 23 of the 24 messages can be traced back to air data.
That's entirely plausible (see my first post in this thread). But we have to be very careful not to jump to the obvious conclusion in this case without additional verification.
Regarding the timely sequence of the error messages, what puzzles me is that both the pitot probe and TCAS-related events have a 02:10 timestamp, whereas the ADR disagree event is 02:12, roughly one minute after the IR2 failure.
That is why I was wondering before how specific the TCAS error code in the ACARS message actually was, and whether other sources of TCAS error can safely be excluded.