Xiaomi door contact changes from OPEN to UNDEF after 60 seconds

Folks,

As above really - my contacts are changing from OPEN to UNDEF after 60 seconds. Is this expected with these? How best to manage this if so? Have a proxy item which gets set via a rule? Seem a lot of overhead.

It does not go from Closed to UNDEF though

New to Xiaomi so not sure of this is normal