I have seen this issue reported internally earlier this week with the similar version. From the internal report, this was occurring with an Agent version 126.96.36.199840. I would first try to see if the latest 12.4 agent for MobiControl addresses this issue which should be a version of 188.8.131.52887. If this does not address the issue please open a support case and provide the following information so it can be investigated by the development to identify what is causing this issue:
ADB log or Android Bug Reporter when the issue was occurring.