Sounds like you are hitting old server win13 possibly? win13 crashed and we had to do emergency migration. you may be having old IP there being used.
Dedicated IPs are being moved to SHARED if they do not meet ARIN required justification, namely it needs to have SSL and be used for that. You cannot just use an IP for the sake of an IP, or we will not get more IP space when needed due to bad usage of the IPs.