Waterfall has confirmed that this issue is now resolved.
Dec 5, 16:39 CST
Since 2PM CT, adjustments have been made on the MBlox platform to ensure that messages are being sent in a timely manner. MBlox is currently monitoring the system to ensure stability.
Nov 30, 16:15 CST
Waterfall has identified an issue which may impact messaging services on some short codes. Waterfall outbound traffic (MTs) may be delayed on some mBlox short codes. Other aggregators are unaffected.
mBlox is working to resolve the issue as quickly as possible. No time to resolution is currently available. We will issue another update as soon as we have more information.
Nov 30, 10:02 CST