I'm so sorry to hear it, Painter. My H's few communications are also very business-like and so weirdly casual. They ought to cause nothing at all, reaction-wise, but they make me feel badly.
(((Painter))))
I think it's hard to deal with this - it's hard if a colleague or a friend suddenly starts acting cold, or a family member cuts you off, which happens - it's very confusing and hurtful. But a partner is the one who is supposed to be there and support you if your friends or family get weird!
M 16 yrs, WH62, P54 3 adult blended kids EA 11/13, BD1 6/14 PA fall 14, BD2 2/15 Piecing 2015, BD3 12/15 Separated 4/16 WH moved OW in 5/16 Divorced 6/15/17