Just reporting that on my network I have a tplink c2 archer and a tplink c9 archer, both receiving signal from dir-890l. Occurring the firmware that was in the c2 archer was locking the dir-890 on wifi, locking pages loading, locking dhcp and restarting it. It is important to check all the equipment on the network before blaming the dir-890l. Equipment that may be on the tip can cause disruption. Detail that everything happened at random.