In the Bouncy Castle JCE Provider version 1.55 and earlier the ECIES implementation allowed the use of ECB mode. This mode is regarded as unsafe and support for it has been removed from the provider.
CWE-310 - Cryptographic Issues
Cryptographic issues is a category of weaknesses related to the design and implementation of the confidentiality and integrity of data. If not addressed, the weaknesses in this category can lead to data quality degradation.