As you know mikrotik uses colon to separate MAC. In MAC Table tab you must enter MAC separated with Hyphen to find some MAC. It would be good, search MAC with Colon too. then you can copy and paste a MAC from mikrotik to Netonix.
If something must be done about it, I think it should accept any format just like the Wireshark MAC OUI tool. Maybe ignore colon, hyphen or any special caracter ? By exemple, Huawei use the following particular format of mac address on Smart AX serie (xPON/DSL): XXXX-XXXX-XXXX