Range extender causing duplicate IP address issues

I have multiple WiFi routers to cover dead spots. All of them are connected using Ethernet to the ISP's main router. That router is on 192.168.100.1 and has DHCP enabled. I disabled DHCP on the secondary ones. The Ethernet cable from the primary runs to the LAN (not the WAN) ports of the secondaries so that all devices get addresses in the same subnet. This has been running fine for a long time till I recently added a TP-Link WL 855RE. It's configured as an extender and has no cable. The DHCP is disabled. TV, Xbox, Android, and Apple devices work fine when within their range. However, Windows

Question by Hussain Akbar on Super User, licensed CC BY-SA. We show a short excerpt and link to the original thread as credit.