I've had my Archer A7 V5 AC1750 running on firmware V1.0.7 for a long time (a year?) with zero issues. Rock solid.
Decided to update to the latest firmware (at that time) 1.0.15.  Update went smooth and I like the new features and fixes.
After a few days my Internet went down and the router internet icon was orange.
Couldn't figure why so I power cycled the router, Internet returns, Internet icon green.
2 days later, same problem, same fix.
1 day later same problem, same fix.
Decided to go back to firmware V1.0.07 - no more Internet failures - rock solid for over a month.
I then saw a newer firmware was released - V1.0.16 - and installed it.
Same problem - after a few days my Internet went down and the router internet icon was orange. Power cycle router, Internet returns.
2 hours later same problem.
Ok, time to again go back to V1.0.7.
And again it's been rock solid on V1.0.7 with zero issues.

Summary:
Firmware V1.0.7 - zero issues
Firmware V1.0.15 - Internet failures
Back to V1.0.7 - zero issues
Firmware V1.0.16 - Internet failures
Back to V1.0.7 - zero issues

Would love to stay on the latest firmware but the last 2 released are unstable for me.
Any ideas or suggestions???