We now pursue the detailed characterization of correlated non-monotonic changes in Bragg reflection intensities observed by electron diffraction from 3D molecular crystals. Our evidence suggests that anomalous fluctuations in Bragg reflection intensity are a manifestation of beaminduced crystal lattice reorientation (BIR). In real space, these changes match the movement of bend contours in crystals. The degree of local crystal lattice reorientation for a given electron fluence is equivalent in magnitude to the beam-induced rotations observed for single particles in cryoEM. We conclude that BIR is a fundamental phenomenon and potential source of error in MicroED that would benefit from tracking and correction during data reduction.