On 2 node RAC, PDB with TDE opens OK on first node, opens in RESTRICTED mode on second RAC node

In alert log on both nodes:

QAPDB(3):ALTER PLUGGABLE DATABASE OPEN detects that an encrypted tablespace has been restored but the master key has not been set for the database, or the database has been flashback'ed prior to first set key of the master key (pdb 3).

QAPDB(3): Resetting the master key is required. Please execute ADMINISTER KEY MANAGEMENT SET ENCRYPTION KEY command, or select the latest master key from V$ENCRYPTION_KEYS and execute ADMINISTER KEY MANAGEMENT USE KEY <key_id> command if the SET ENCRYPTION KEY command cannot find and decide the master key to use.

There aren't any error codes, just the messages above.