Embedded Wikidata Query Service timeline is not appropriately adjusted for its vertical size. This happens (at least) if there is an icon. The vertical adjustment tool is neither visible. Example: https://tools.wmflabs.org/scholia/work/Q50063106
I would have expected that the vertical size would be sufficiently large so that it would be possible to read what is on the individual panels of the timeline. The sizing is correct in the non-embedded WDQS after pressing the up-down button in the interface, see this example: