We have a temporary DU for "Multiple Undue ECAM Alerts" for some of our A320 fleet, which lists EGT overlimit as one of the alerts. There's also an issue where a failing wiring harness or generator can trigger a long list of spurious alerts and warnings as the voltage fluctuates but isn't detected by the GCU.
I've had that one, it's *really* confusing. Doesn't help if it's engine one either as you can lose the captain's ACP and VHF1.
Wonder if it's related to this?