Phase shift in relative frequencies due to relativistic effects invalidates relativistic covariant spacetime:

In relativity, time and space are relativistic covariant but phase shift in frequencies due to relativistic effects invalidate relativistic covariant spacetime.

Explanation

In physics and statistics, time and space are polymorphous, but in pure mathematics time and space have no physical properties. They are only mathematical parameters:

In classical physics, time and space are determinist and invariant; 

In statistical physics, time and space are probabilistic and invariant; 

In relativity, time and space are relativistic, covariant, and downgraded mere components of relativistic spacetime; 

In quantum physics, time and space are probabilistic and invariant.

However, in relativity, time and space are relativistic covariant but Phase shift in relative frequencies due to relativistic effects invalidates relativistic covariant spacetime.

Reference: Relativistic effects on phaseshift in frequencies invalidate time dilation II