Part of Lithium plating, Lithium plating as unwanted side reaction in commercial Li-ion cells – A review, Cell capacity fade.

Confirmation (in accordance with "Bumpy" voltage relaxation indicates Lithium plating) [2]:

Note that both Lithium plating and SEI thickening contribute to Loss of lithium inventory, so just knowing that a cell's degradation is primarily due to loss of lithium inventory doesn't allow to say whether there is dangerous Lithium plating in a cell or not.

See also:

• Charging at low temperature leads to Lithium plating
• Storing a cell at a high temperature and state-of-charge accelerates capacity fade
• We could roughly discern between the physical causes of cell degradation from the SoH, the pace of degradation, and the average cell temperature and current over the battery lifetime

References

[1] Temperature dependent ageing mechanisms in Lithium-ion batteries – A Post-Mortem study. (2014)

[2] Investigation of capacity recovery effects due to rest periods during high current cyclic ageing tests in Li-ion cells and their influence on lifetime