Temperature readings are high on income eletrical feeds to the breaker box
With aluminum service conductors if an anti oxide compound was not used the connection may be failing. Also if the terminals were not properly torqued this can happen. The 2017 NEC has a new section on torque requirements for this very reason. Re torquing the service requires hot gloves and flash gear if the service is live. I have never found a zip tie to cause an over heating problem. But have found many terminations that needed to be tightened both with copper and aluminum wire (I have found more problems with aluminum than copper).