Parallel proceedings before the USPTO Patent Trial and Appeal Board (PTAB) are a common feature of district court litigation, and it is common for the factual records to overlap between.
As for the Judiciary, the U.S. Supreme Court did not issue any relevant decisions nor grant certiorari in any notable FCA cases in FY21. To the contrary, they denied petitions to review.
How Express Contract Terms and the Negotiation Process May Affect Liability - Parties entering into a contract should negotiate in good faith, but parties must also.