Terracotta (InitialConnection-149) when joining Bedrock Dedicated Server 1.26.61.1

After updating from Bedrock Dedicated Server 1.26.60.6 to 1.26.61.1, players can no longer join my dedicated bedrock server. The client immediately receives a Terracotta error with "InitialConnection-149".

The server was working normally on version 1.26.60.6 using the same world, server configuration, hardware, and network settings.

Steps to reproduce:

1. Start Bedrock Dedicated Server 1.26.61.1.

2. Attempt to join the server from Minecraft for Windows.

3. Connection fails before entering the world.

Expected result:

Players should be able to join the server normally, as they could on version 1.26.60.6.

Actual result:

The connection fails during the initial connection process and the client receives:

Terracotta
Error Detail: InitialConnection-149

Additional information:

• Bedrock Dedicated Server 1.26.61.1

• Client version 1.26.60 (Windows GDK)

• The server uses the default Bedrock networking stack (RakNet)

• The same world and server configuration worked correctly on Dedicated Server 1.26.60.6

• No significant changes were made to the server configuration between versions

• The issue occurs for all players

• The issue also occurs when joining through the server's local IP address on the same network, indicating it is not related to port forwarding or external connectivity

• The server starts successfully and remains online, but players cannot complete the connection process

Error screen details:

Terracotta
InitialConnection-149
Version: 1.26.60-Windows GDK Build
WorldName: Mystica_v2 local