eNom requires domain owners to renew domains before expiration date, although from OBAS reneal orders are completed on the expiration date as usual.
Such behavior was classified as the software issue PBAS-30145 and was fixed in OBAS 4.5.6 release.
To resolve the issue, please upgrade to 4.5.6 as described in How to upgrade OBAS system to the latest available version.
As a workaround you can add affected domains' TLDs as a parameter for
ENOM_AUTORENEW_TLDS constant used in the