Add null check since we now have callbacks without data
Related commit: e-mission/e-mission-data-collection@a726584
Related release: https://github.com/e-mission/e-mission-data-collection/releases/tag/v1.6.0
Related commit: e-mission/e-mission-data-collection@a726584
Related release: https://github.com/e-mission/e-mission-data-collection/releases/tag/v1.6.0