[OnePlus 3 ROMs, Kernels, Recoveries, & Other Devel] AlkaliV2:
So in my super un-educated opinion looking through your logcat I found only one wifi callout shown below:

10-19 19:42:03.680 2966 3345 I WifiHAL : wifi_start_gscan: RequestId:5739

10-19 19:42:03.680 2966 3345 I WifiHAL : wifi_start_gscan: Base Period:10000 Max_ap_per_scan:25 Threshold_percent:100 Threshold_num_scans:10 num_buckets:1

10-19 19:42:03.680 2966 3345 I WifiHAL : wifi_start_gscan: Index: 0 Bucket Id:2 Band:3 Period:10000 ReportEvent:2 numChannelSpecs:0 max_period:0 exponent:0 step_count:0

10-19 19:42:05.346 2966 3358 I WifiHAL : event received NL80211_CMD_VENDOR, vendor_id = 0x1374, subcmd = 0x1b

10-19 19:42:05.346 2966 3358 I WifiHAL : handleEvent: Scan event type: 1, status = 0.

10-19 19:42:05.346 2966 3345 I WifiHAL : wifi_get_cached_gscan_results: RequestId:10

10-19 19:42:05.347 2966 3345 I WifiHAL : wifi_get_cached_gscan_results: flush:255 max:64

10-19 19:42:05.351 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.351 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: -1

10-19 19:42:05.351 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.352 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 2

10-19 19:42:05.352 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.352 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.352 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.352 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 4

10-19 19:42:05.352 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.352 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.352 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.352 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 6

10-19 19:42:05.352 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.352 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.352 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 8

10-19 19:42:05.353 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.353 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 10

10-19 19:42:05.353 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.353 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 12

10-19 19:42:05.353 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.353 2966 3345 E WifiHAL : More data: 1, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.353 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 14

10-19 19:42:05.354 2966 3345 E WifiHAL : handleResponse: num Cached results in this fragment:1

10-19 19:42:05.354 2966 3345 E WifiHAL : More data: 0, firstScanIdInPatch: 0, lastProcessedScanId: 0

10-19 19:42:05.354 2966 3345 E WifiHAL : gscan_get_cached_results: starting counter: 0

10-19 19:42:05.354 2966 3345 E WifiHAL : gscan_get_cached_results: cached_results[0].num_results: 15

10-19 19:42:05.354 2966 3345 I WifiHAL : copyCachedScanResults: cached_results[0].num_results : 15

10-19 19:42:05.354 2966 3345 I WifiHAL : wifi_get_cached_gscan_results: max: 64, num:1

10-19 19:42:05.359 2966 3345 I WifiHAL : wifi_stop_gscan: RequestId:5739

The WifiHAL process I pointed to above is the only real Wifi callout I see in your log. I'll have to let Sultan look at it and see if he thinks there is a reason in the logs to know why your Wifi is not letting the device sleep on 5GHz. It's out of my troubleshooting league.