corrupted uart output from nrf52840 dongles

The uart output of nrf52840 dongles is corrupted, including no lines separation, strange characters. for example:

5E0 to 1:00000000148A0C90 [18FF] [UDP:�]�8~~[fdbc:dc24:98eb:1:78d1:56eb:a28f:a3b9]:5540] --- Type 0001:05 (IM:ReportData) (B:41),�9~~[63603134] <inf> chip: [EM]??1 [E:8044i S:40943 M:157195796] (S) Msg Retransmission to 1:00000000148A0C90 scheduled for 2152ms f'�#A~~rom now [State:Idle II:500 AI:300 AT:4000]NE�y~~[63604028] <inf
> chip: [EM]>>> [E:8044i S:40943 M:244546721 (Ack:157195796)] (S) Msg RX from 1:00000000148A0C90 [18FF] to 000000��8�~~00632F05E0 --- Type 0001:01 (IM:StatusResponse) (B:42)�yX~~[63604128] <inf> chip: [EM]<<< [E:8044i S:40943 M:157195797 (Ack:244546721)] (S) Msg TX from 00000000632F05E0 to 1:00000000148A0�{�~~C90 [18FF] [UDP:[fdb
c:dc24:98eb:1:78d1:56eb:a28f:a3b9]:5540] --- Type 0000:10 (SecureChannel:StandaloneAck) (B:34)�i��~~[63998848] <err> chip: [SC]CASESession timed out while waiting for a response from peer <00000000269C29C4, 1>. Current state wasim�D~~ 4���~~[63998893] <dbg> chip: LogV: [IN]SecureSession[0x200034b8]: Released - Type:2 LSID:40953hM>
k~~[63998929] <dbg> chip: LogV: [DIS]OperationalSessionSetup[1:00000000269C29C4]: State change 4 --> 2���2~~[63998965] <dbg> chip: LogV: [DIS]OperationalSessionSetup[1:00000000269C29C4]: State change 2 --> 1����~~[63998999] <err> chip: [DMG]Failed to establish CASE for subscription-resumption with error '32'�'F~

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