Which firmware are you using DDWRT or Stock firmware.
What is distance between your wireless client and R7000?
Check if the problem exists when using different channel.
Supply chain attacks, ransomware attacks, phishing, data breaches; all these types of attacks are on the rise, thanks to the expansion of the connected world. With greater expansion comes greater security risk.
Try R23310, it worked for me with DHCP issues.
http://www.desipro.de/ddwrt/K3-AC-Arm/r23310/
Which firmware are you using DDWRT or Stock firmware.
What is distance between your wireless client and R7000?
Check if the problem exists when using different channel.