[serallak]

The part where it gave you access to a thread you were not a part of seems scary to me..

In this case your absence from the thread was probably an oversight, but in general there could be a very good reason for it

[noisem4ker]

The only way I can reasonably interpret it is that it was a discussion on a Teams channel they had access to but weren't involved in.

[w0m]

this; it was a public channel I had access to, but never look at (I'm on... too many to keep up with, fairly large company).