If RDM is not active, SSH sessions are dropped

Hello,

RDM Enterprise Edition version 2021.1.10.0
MacOS 11.2.3

If RDM is not active, SSH sessions are dropped for about 2-20 minutes. Session log:

[7/21/2021 4:04:56 PM] Devolutions Protocols version: 2021.6.4.1 macOS
[7/21/2021 4:04:56 PM] Starting SSH, verbose level: 4
[7/21/2021 4:04:56 PM] Setting up connection
[7/21/2021 4:04:56 PM] Connecting to port: 22 (IP any)
[7/21/2021 4:04:56 PM] SSH banner: SSH-2.0-OpenSSH_7.2p2 Ubuntu-4ubuntu2.10

[7/21/2021 4:04:56 PM] Sending kex init
[7/21/2021 4:04:56 PM] Received kex init
[7/21/2021 4:04:56 PM] Selected algorithms: curve25519-sha256@libssh.org, ssh-ed25519, chacha20-poly1305@openssh.com, chacha20-poly1305@openssh.com, implicit by cipher, implicit by cipher, none, none
[7/21/2021 4:04:56 PM] Sending Ed25519 kex init
[7/21/2021 4:04:56 PM] Received Ed25519 kex reply
[7/21/2021 4:04:56 PM] Successfully authentified server
[7/21/2021 4:04:56 PM] Sending new keys message
[7/21/2021 4:04:56 PM] Sending userauth service request
[7/21/2021 4:04:56 PM] Received new keys message
[7/21/2021 4:04:56 PM] Received extension info message
[7/21/2021 4:04:56 PM] Server accepts public key types: rsa-sha2-256,rsa-sha2-512
[7/21/2021 4:04:56 PM] Received service accepted message
[7/21/2021 4:04:56 PM] Using provided key data
[7/21/2021 4:04:56 PM] Sending userauth init request
[7/21/2021 4:04:56 PM] Received userauth failure: publickey
[7/21/2021 4:04:56 PM] Starting authentication by key
[7/21/2021 4:04:56 PM] Validating public key: rsa-sha2-512
[7/21/2021 4:04:56 PM] Received userauth key ok
[7/21/2021 4:04:56 PM] Sending userauth public key signature: rsa-sha2-512
[7/21/2021 4:04:56 PM] Received userauth success
[7/21/2021 4:04:56 PM] User authenticated successfuly by public key
[7/21/2021 4:04:56 PM] Sending session channel open request: 0/-
[7/21/2021 4:04:56 PM] Received global request: hostkeys-00@openssh.com , no need to reply
[7/21/2021 4:04:57 PM] Received channel open confirmation: 0/0 WS 200000/0 MPS 32000/32768
[7/21/2021 4:04:57 PM] Sending pty request: 0/0 xterm-256color width = 232 height = 63
[7/21/2021 4:04:57 PM] Received channel success: 0/0
[7/21/2021 4:04:57 PM] Setting up LANG=en_US.UTF-8
[7/21/2021 4:04:57 PM] Sending environment variable request: 0/0
[7/21/2021 4:04:57 PM] Received channel success: 0/0
[7/21/2021 4:04:57 PM] Sending shell request: 0/0
[7/21/2021 4:04:57 PM] Received window adjust: 0/0 2097152
[7/21/2021 4:04:57 PM] Received channel success: 0/0
[7/21/2021 4:04:57 PM] New Data 345 bytes
[7/21/2021 4:04:57 PM] New Data 119 bytes
[7/21/2021 4:04:57 PM] New Data 59 bytes
[7/21/2021 4:04:57 PM] New Data 76 bytes
[7/21/2021 4:04:57 PM] New Data 1 bytes
[7/21/2021 4:04:57 PM] New Data 1 bytes
[7/21/2021 4:04:57 PM] New Data 1 bytes
[7/21/2021 4:04:57 PM] New Data 1 bytes
[7/21/2021 4:04:57 PM] New Data 1 bytes
[7/21/2021 4:04:57 PM] New Data 1 bytes
[7/21/2021 4:04:57 PM] New Data 3 bytes
[7/21/2021 4:04:57 PM] New Data 65 bytes
[7/21/2021 4:04:57 PM] New Data 46 bytes
[7/21/2021 4:05:27 PM] Sending nop
[7/21/2021 4:05:57 PM] Sending nop
[7/21/2021 4:06:27 PM] Sending nop
[7/21/2021 4:07:01 PM] Sending nop
[7/21/2021 4:07:31 PM] Sending nop
[7/21/2021 4:08:09 PM] Sending nop
[7/21/2021 4:08:44 PM] Sending nop
[7/21/2021 4:09:16 PM] Sending nop
[7/21/2021 4:09:52 PM] Sending nop
[7/21/2021 4:10:23 PM] Sending nop
[7/21/2021 4:10:56 PM] Sending nop
[7/21/2021 4:11:37 PM] Sending nop
[7/21/2021 4:12:18 PM] Sending nop
[7/21/2021 4:12:53 PM] Sending nop
[7/21/2021 4:13:31 PM] Sending nop
[7/21/2021 4:13:55 PM] SSH Error reading raw input
[(-21) Operation timed out.]
[7/21/2021 4:13:55 PM] Disconnection in progress
[7/21/2021 4:13:55 PM] Sending channel close request: 0/0
[7/21/2021 4:13:55 PM] Disconnecting

Other clients (iTerm2, terminal, MobaXterm) work well