Well I can tell you that this version FAILS yet again when the RT-AC68U unit is in AIMESH node mode with a GT-AX11000. This is like 3 failed revisions now & I can easily recreate the failure & also I can always revert to version 3.0.0.4.386.48262 which again seems stable with latest & previous versions of firmware for the GT-AX11000. What I hate is my wasted time & the fact if I reboot the Main node it forgets about the RT-AC68U's because they seem to disassociate(?) after firmware update. I saw one of the first comments in this thread praising that they still did firmware updates but what is the point if they break everything? Why can I always revert, something is clearly an issue here. Total time suck & wasted energy. Very disappointed in quality control here. Perhaps it is an issue specific to the main hub model & this model as an AIMESH node? Since these operate in NODE mode & you cannot really attack / talk to them directly, I do wonder if I should even bother to worry about the security threat they may pose in NODE mode. Obviously I would prefer to not ignore updates, hence why I have wasted so much time trying to get these RT-AC68U's updated. That is the irony I have one for emergency backup & I can recreate the issue on both & I can revert and get stable on both by using the stable firmware 3.0.0.4.386.48262. What is the attack angle & threat while in NODE mode I am unclear, I plan to investigate & if severe I will probably go way from ASUS & get a product less prone to quality issues. I am retired now & have worked with HP Procurves, Aruba, CI$CO, Allied Telesis & I have never experienced such flakey firmware releases consecutively along model/brand line. Just search for AIMESH connectivity issues & how I found this forum, everyone is terrified to update their firmware. They really need to get their act together to be taken seriously. I was hoping to get ~ 5 years with this GT-AX11000 but I need reliable & secure MESH coverage, I doubt ASUS can deliver & I shouldn't require enterprise class gear for home use. Just pathetic.