Hello @Lai,
We are unable to find the difference between Firmware 8.5.4 RC1 and the release of Firmware 8.5.4 GA.
Three days does not give the Peplink Community sufficient time to adequately support Peplink in field testing, which contrasts with previous discussions and trends with the Peplink community & Partners.
In a Peplink Partner Community Discussion, this was covered, and Peplink expressed that they would be more vigilant in the release cycle and communications (URL for Peplink Partners
https://forum.peplink.com/t/switch-firmware-2-0-3-ga-announcement-for-partner/57889/6?u=mldowling ).
Please consider withdrawing the GA until fair time is given for the Peplink Community (& your Peplink Partners) to test and address issues found, noting that some have already been reported in the community discussions with 8.5.4 RC1.
Have a good day,
Marcus 