Hardware v2.6 (US)

Hi all, I'm dealing with an issue with my new BE63 (another name is BE11000). I added it into my current X55 pro pack, replaced the main X55 with the new BE63, everything else stay the same.

ONT > Main Deco > TL-SG105-M2 unmanaged > 3 satellite Decos

TL-SG105-M2 also connect > TL-SG116 unmanaged switch

TL-SG116 also connect > TL-SG108 unmanaged switch & Other devices, (and previously there was an TL-SG105E managed switch connected to this TL-SG116 as well)

This topology has worked for me for nearly a year without issues, but right when I setup the BE63 as main Deco, I started to experienced network loss suddenly, like everything went down abruptly (all satellites blinking red), wired devices also disconnected, my phone keeps switching on/off wifi. There was no internet connection at all. I thought having 2 switches connected to the TL-SG116 causing issue so I removed TL-SG108 out and the network has been good for a week. Until this morning when I got the same issue again. This time I removed the TL-SG116 out of the network but still, so I reset everything again and put back the X55 pro as main Deco and removed the BE63. I also replaced TL-SG105E with the TL-SG108. It currently works and I hope it stays stable cause this topology has been working fine for me.

Back to the BE63, the reason why I replaced the TL-SG105E managed switch is because it has Loop Prevention feature and other switches are unmanaged which I checked each of them on Tplink website and they don't mention Loop Prevention feature. I also saw that the BE63 has Wireless and Wired Combined Backhaul as the BE95. If all Deco at the same time using both wired + wireless backhaul, will this is the main reason why I'm experiencing loop issue? And do Tplink switches with Loop Prevention feature are not suitable for wired backhaul? I'm just super confused.

Thanks again