Game freezes when client fails to download server resource pack

When the player downloads the resource pack, after the MOJANG splash screen dissapeared, the game freezes with "Making Request... 100%".
This happenes only if player already downloaded resourcepack from this server before.
Minecraft stops responding to any button presses.
Server have no error output.
Since 1.16 Minecraft version.

[15:34:46] [Downloader 0/INFO]: [STDERR]: java.net.ConnectException: Connection refused: connect
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.DualStackPlainSocketImpl.connect0(Native Method)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.DualStackPlainSocketImpl.socketConnect(DualStackPlainSocketImpl.java:79)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.AbstractPlainSocketImpl.doConnect(AbstractPlainSocketImpl.java:350)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.AbstractPlainSocketImpl.connectToAddress(AbstractPlainSocketImpl.java:206)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.AbstractPlainSocketImpl.connect(AbstractPlainSocketImpl.java:188)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:172)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.SocksSocketImpl.connect(SocksSocketImpl.java:392)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.Socket.connect(Socket.java:606)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.net.Socket.connect(Socket.java:555)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.NetworkClient.doConnect(NetworkClient.java:180)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.http.HttpClient.openServer(HttpClient.java:463)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.http.HttpClient.openServer(HttpClient.java:558)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.http.HttpClient.<init>(HttpClient.java:242)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.http.HttpClient.New(HttpClient.java:339)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.http.HttpClient.New(HttpClient.java:357)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.protocol.http.HttpURLConnection.getNewHttpClient(HttpURLConnection.java:1226)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.protocol.http.HttpURLConnection.plainConnect0(HttpURLConnection.java:1205)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.protocol.http.HttpURLConnection.plainConnect(HttpURLConnection.java:1056)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.protocol.http.HttpURLConnection.connect(HttpURLConnection.java:990)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.protocol.http.HttpURLConnection.getInputStream0(HttpURLConnection.java:1570)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at sun.net.www.protocol.http.HttpURLConnection.getInputStream(HttpURLConnection.java:1498)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at aff.a(SourceFile:140)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1604)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
[15:34:46] [Downloader 0/INFO]: [STDERR]: 	at java.lang.Thread.run(Thread.java:748)
[15:34:46] [Downloader 0/WARN]: Pack application failed: java.lang.NullPointerException, deleting file C:\Users\Пользователь\AppData\Roaming\.minecraft\server-resource-packs\60e0e250fec6673fa5b5386e6dc4c58bb6b13400
[15:34:46] [Downloader 0/WARN]: Failed to delete file C:\Users\Пользователь\AppData\Roaming\.minecraft\server-resource-packs\60e0e250fec6673fa5b5386e6dc4c58bb6b13400: C:\Users\Пользователь\AppData\Roaming\.minecraft\server-resource-packs\60e0e250fec6673fa5b5386e6dc4c58bb6b13400