I´m sending unconfirmed uplink messages to avoid frame lost. (at+send=0,2,53B12E78)
TxSuccessCnt:1, Join
at+recv=3,0,0
TxSuccessCnt:2, TxPower=0, DR0 ,tm=1319
at+recv=2,0,0 ,downLinkCounter=0
TxSuccessCnt:3, TxPower=0, DR5 ,tm=52
at+recv=2,0,0 ,downLinkCounter=0
TxSuccessCnt:4, TxPower=2, DR5 ,tm=52
at+recv=2,0,0 ,downLinkCounter=1
TxSuccessCnt:5, TxPower=4, DR5 ,tm=52
at+recv=2,0,0 ,downLinkCounter=2
TxSuccessCnt:6, TxPower=6, DR5 ,tm=52
at+recv=2,0,0 ,downLinkCounter=3
TxSuccessCnt:7, TxPower=7, DR5 ,tm=52
TxSuccessCnt:8, TxPower=7, DR5 ,tm=52
TxSuccessCnt:9, TxPower=7, DR5 ,tm=52
TxSuccessCnt:10, TxPower=7, DR5 ,tm=52
TxSuccessCnt:11, TxPower=7, DR5 ,tm=52
TxSuccessCnt:12, TxPower=7, DR5 ,tm=52
TxSuccessCnt:13, TxPower=7, DR5 ,tm=52
TxSuccessCnt:14, TxPower=7, DR5 ,tm=52
TxSuccessCnt:15, TxPower=7, DR5 ,tm=52
TxSuccessCnt:16, TxPower=7, DR5 ,tm=52
TxSuccessCnt:17, TxPower=7, DR5 ,tm=52
TxSuccessCnt:18, TxPower=7, DR5 ,tm=52
TxSuccessCnt:19, TxPower=7, DR5 ,tm=52
TxSuccessCnt:20, TxPower=7, DR5 ,tm=52
TxSuccessCnt:21, TxPower=7, DR5 ,tm=52
TxSuccessCnt:22, TxPower=7, DR5 ,tm=52
TxSuccessCnt:23, TxPower=7, DR5 ,tm=52
TxSuccessCnt:24, TxPower=7, DR5 ,tm=52
TxSuccessCnt:25, TxPower=7, DR5 ,tm=52
TxSuccessCnt:26, TxPower=7, DR5 ,tm=52
TxSuccessCnt:27, TxPower=7, DR5 ,tm=52
TxSuccessCnt:28, TxPower=7, DR5 ,tm=52
TxSuccessCnt:29, TxPower=7, DR5 ,tm=52
TxSuccessCnt:30, TxPower=7, DR5 ,tm=52
TxSuccessCnt:31, TxPower=7, DR5 ,tm=52
TxSuccessCnt:32, TxPower=7, DR5 ,tm=52
TxSuccessCnt:33, TxPower=7, DR5 ,tm=52
TxSuccessCnt:34, TxPower=7, DR5 ,tm=52
TxSuccessCnt:35, TxPower=7, DR5 ,tm=52
TxSuccessCnt:36, TxPower=7, DR5 ,tm=52
TxSuccessCnt:37, TxPower=7, DR5 ,tm=52
TxSuccessCnt:38, TxPower=7, DR5 ,tm=52
TxSuccessCnt:39, TxPower=7, DR5 ,tm=52
TxSuccessCnt:40, TxPower=7, DR5 ,tm=52
TxSuccessCnt:41, TxPower=7, DR5 ,tm=52
TxSuccessCnt:42, TxPower=7, DR5 ,tm=52
TxSuccessCnt:43, TxPower=7, DR5 ,tm=52
TxSuccessCnt:44, TxPower=7, DR5 ,tm=52
TxSuccessCnt:45, TxPower=7, DR5 ,tm=52
TxSuccessCnt:46, TxPower=7, DR5 ,tm=52
TxSuccessCnt:47, TxPower=7, DR5 ,tm=52
TxSuccessCnt:48, TxPower=7, DR5 ,tm=52
TxSuccessCnt:49, TxPower=7, DR5 ,tm=52
TxSuccessCnt:50, TxPower=7, DR5 ,tm=52
TxSuccessCnt:51, TxPower=7, DR5 ,tm=52
TxSuccessCnt:52, TxPower=7, DR5 ,tm=52
TxSuccessCnt:53, TxPower=7, DR5 ,tm=52
TxSuccessCnt:54, TxPower=7, DR5 ,tm=52
TxSuccessCnt:55, TxPower=7, DR5 ,tm=52
TxSuccessCnt:56, TxPower=7, DR5 ,tm=52
TxSuccessCnt:57, TxPower=7, DR5 ,tm=52
TxSuccessCnt:58, TxPower=7, DR5 ,tm=52
TxSuccessCnt:59, TxPower=7, DR5 ,tm=52
TxSuccessCnt:60, TxPower=7, DR5 ,tm=52
TxSuccessCnt:61, TxPower=7, DR5 ,tm=52
TxSuccessCnt:62, TxPower=7, DR5 ,tm=52
TxSuccessCnt:63, TxPower=7, DR5 ,tm=52
TxSuccessCnt:64, TxPower=7, DR5 ,tm=52
TxSuccessCnt:65, TxPower=7, DR5 ,tm=52
TxSuccessCnt:66, TxPower=7, DR5 ,tm=52
TxSuccessCnt:67, TxPower=7, DR5 ,tm=52
TxSuccessCnt:68, TxPower=7, DR5 ,tm=52
TxSuccessCnt:69, TxPower=7, DR5 ,tm=52
TxSuccessCnt:70, TxPower=7, DR5 ,tm=52
TxSuccessCnt:71, TxPower=0, DR5 ,tm=52
at+recv=2,0,0 ,downLinkCounter=4
TxSuccessCnt:72, TxPower=0, DR5 ,tm=52
TxSuccessCnt:73, TxPower=0, DR5 ,tm=52
TxSuccessCnt:74, TxPower=0, DR5 ,tm=52
TxSuccessCnt:75, TxPower=0, DR5 ,tm=52
TxSuccessCnt:76, TxPower=0, DR5 ,tm=52
TxSuccessCnt:77, TxPower=0, DR5 ,tm=52
TxSuccessCnt:78, TxPower=0, DR5 ,tm=52
TxSuccessCnt:79, TxPower=0, DR5 ,tm=52
TxSuccessCnt:80, TxPower=0, DR5 ,tm=52
TxSuccessCnt:81, TxPower=0, DR5 ,tm=52
TxSuccessCnt:82, TxPower=0, DR5 ,tm=52
TxSuccessCnt:83, TxPower=0, DR5 ,tm=52
TxSuccessCnt:84, TxPower=0, DR5 ,tm=52
TxSuccessCnt:85, TxPower=0, DR5 ,tm=52
TxSuccessCnt:86, TxPower=0, DR5 ,tm=52
TxSuccessCnt:87, TxPower=0, DR5 ,tm=52
TxSuccessCnt:88, TxPower=0, DR5 ,tm=52
TxSuccessCnt:89, TxPower=0, DR5 ,tm=52
TxSuccessCnt:90, TxPower=0, DR5 ,tm=52
TxSuccessCnt:91, TxPower=0, DR5 ,tm=52
TxSuccessCnt:92, TxPower=0, DR5 ,tm=52
TxSuccessCnt:93, TxPower=0, DR5 ,tm=52
TxSuccessCnt:94, TxPower=0, DR5 ,tm=52
TxSuccessCnt:95, TxPower=0, DR5 ,tm=52
TxSuccessCnt:96, TxPower=0, DR5 ,tm=52
TxSuccessCnt:97, TxPower=0, DR5 ,tm=52
TxSuccessCnt:98, TxPower=0, DR5 ,tm=52
TxSuccessCnt:99, TxPower=0, DR5 ,tm=52
TxSuccessCnt:100, TxPower=0, DR5 ,tm=52
TxSuccessCnt:101, TxPower=0, DR5 ,tm=52
TxSuccessCnt:102, TxPower=0, DR5 ,tm=52
TxSuccessCnt:103, TxPower=0, DR5 ,tm=52
TxSuccessCnt:104, TxPower=0, DR5 ,tm=52
TxSuccessCnt:105, TxPower=0, DR5 ,tm=52
TxSuccessCnt:106, TxPower=0, DR5 ,tm=52
TxSuccessCnt:107, TxPower=0, DR5 ,tm=52
TxSuccessCnt:108, TxPower=0, DR5 ,tm=52
TxSuccessCnt:109, TxPower=0, DR5 ,tm=52
TxSuccessCnt:110, TxPower=0, DR5 ,tm=52
TxSuccessCnt:111, TxPower=0, DR5 ,tm=52
TxSuccessCnt:112, TxPower=0, DR5 ,tm=52
TxSuccessCnt:113, TxPower=0, DR5 ,tm=52
TxSuccessCnt:114, TxPower=0, DR5 ,tm=52
TxSuccessCnt:115, TxPower=0, DR5 ,tm=52
TxSuccessCnt:116, TxPower=0, DR5 ,tm=52
TxSuccessCnt:117, TxPower=0, DR5 ,tm=52
TxSuccessCnt:118, TxPower=0, DR5 ,tm=52
TxSuccessCnt:119, TxPower=0, DR5 ,tm=52
TxSuccessCnt:120, TxPower=0, DR5 ,tm=52
TxSuccessCnt:121, TxPower=0, DR5 ,tm=52
TxSuccessCnt:122, TxPower=0, DR5 ,tm=52
TxSuccessCnt:123, TxPower=0, DR5 ,tm=52
TxSuccessCnt:124, TxPower=0, DR5 ,tm=52
TxSuccessCnt:125, TxPower=0, DR5 ,tm=52
TxSuccessCnt:126, TxPower=0, DR5 ,tm=52
TxSuccessCnt:127, TxPower=0, DR5 ,tm=52
TxSuccessCnt:128, TxPower=0, DR5 ,tm=52
TxSuccessCnt:129, TxPower=0, DR5 ,tm=52
TxSuccessCnt:130, TxPower=0, DR5 ,tm=52
TxSuccessCnt:131, TxPower=0, DR5 ,tm=52
TxSuccessCnt:132, TxPower=0, DR5 ,tm=52
TxSuccessCnt:133, TxPower=0, DR5 ,tm=52
TxSuccessCnt:134, TxPower=0, DR5 ,tm=52
TxSuccessCnt:135, TxPower=0, DR5 ,tm=52
TxSuccessCnt:136, TxPower=0, DR5 ,tm=52
at+recv=2,0,0 ,downLinkCounter=5
TxSuccessCnt:137, TxPower=0, DR5 ,tm=52
TxSuccessCnt:138, TxPower=0, DR5 ,tm=52
TxSuccessCnt:139, TxPower=0, DR5 ,tm=52
As you can see after downLinkCounter=3 (ADR downlink from server) it takes 64 messages sent until TxPower changes to 0. After that it receive a downlink message from server, but then the power never changes.
Also you can see the server always sends a downlik after 64 uplinks.