High-precision lifetime measurements of the 4+1 and 6+1 states in 92Mo and 94Ru are performed following the 36Ar + 64Zn fusion-evaporation reaction, employing a novel delayed-gated LaBr3 triple-gamma coincidence method. The lifetime of 4+1 is determined to be 33(5) ps for 92Mo and 70(4) ps for 94Ru, respectively. Our data confirm the anomalous enhancement of B(E 2; 4+-* 2+) in 94Ru versus previously known suppression in 96Pd. Shell-model calculation in the f5 pg9 model space with the monopole-based universal interaction demonstrates that rescaling off-diagonal two-body matrix elements reproduces all the B(E 2; 4+-* 2+) strengths without perturbing the others such as B(E 2; 6+-* 4+) and B(E 2; 8+-* 6+), identifying the significant influence of cross-orbital off-diagonal matrix elements on B(E2) strengths as well as the underlying partial seniority symmetry breaking.