Mobile banking app Current sued Facebook’s Calibra over their very similar logos. Apparently Facebook refused to change the logo upon being contact in July 2019 when the project was unveiled.
Calibra is a subsidiary of Facebook, responsible for managing the wallet for Facebook’s planned new Libra cryptocurrency. Libra is in trouble other ways too. Recently Mastercard, VISA, eBay, PayPal and Stripe, the largest and most important players pulled out of the earlier agreement to join Libra initiative, after the project received strong pushback from the USA and the European Union.