Well, “wireless” package is not wifi-qcom-ac package. According to the attached config you were still using legacy wireless. My condolences.
Indeed. Oh my dear, 2.4ghz on MT legacy wireless. I experienced all these troubles myself. 5ghz was okayish - not as fast as one would expect but reliable at least. As long I did not turn off and on the wifi on my Huawei tablet - that action triggered a “DFS radar detection”. I used a scheduler script to work around. However, I have no need for high throughput/speeds as my ISP connection is only 100/50 LTE. But 2.4ghz I only used that band for portable devices and streaming on TV which could live with those “instability”. Ping loss - check. Highly varying throughput - check. Random transmission timeouts because of mysterious interferences - check. One known problem at my home was the microwave. I am using that microwave maybe once or twice a week, but I noticed: every time the microwave was running - 2.4ghz wireless was dead. There was a 100% correlation. But I did not care much for this particular “noise” - because who cares for twice a week. But there were other “interference sources” apparently too - because where did the timeouts and ping losses came from? And I had one wireless client that lost connection to AP after some time and did not reconnect until restarted (it was a audio streaming device).
One day wifi-qcom-ac landed in MT universe. Uninstalled legacy wireless, installed wifi-qcom-ac. Resolved. Rock stable 2.4ghz wireless - check. Microwave running for minutes (making popcorn) and 2.4ghz wireless still useable - check. Reliable pings on 2.4ghz - check. Reliable connection - check. No more fake DFS detections - check. Formerly problematic clients now connect flawlessly - check. Device roaming - check. Stupid “poor man’s band steering” access list no more needed. Can’t say anything bad at all. Overall satisfaction with MT wireless increased. So the hardware was not the issue. It was all the way software/driver. Did a personal comparison with Unifi U6+ and I could not find a single benefit for me (other than: “I now have big wifi6 balls”) that would justify the upgrade for me. Thanks again MikroTik who made it possible.
And specifically to the new devices:
Well done OP. Exchange old devices like “CAP lite” and even “CAP AC” with Unifi devices from a) different price range and b) vastly better specs. I mean: way better than any current MT wifi6 devices. It would be a shame to not see a tremendous improvement in all belongings (stability, speed, etc.) when upgrading a crapola old devices fleet of “CAP Lite” and “hap ac lite” with “U6 Pro” and “U6 Enterprise”. MT does not even offer such powerful devices in their current product range. I am not aware of any MT wireless device which could do more than 2x2.