If the Web Admin's TLS Listening Interface is the MMP, this may cause out of memory problems if there are a lot of web/API requests. The MMP module is simply not designed to handle web traffic. Once out of memory various processes such as syslog or web proxy may be killed to maintain core functionality, resulting in the loss of Syslog messages or Web Admin access.
Therefore, although Web Admin will work on the MMP interface, we do not recommend this deployment. The Web Admin interface should be moved to another one using the MMP command: webadmin listen (a|b|c|d) [<port>].