Unreliable debug launching

I'm using CCES 3.0.3 with an ICE-1000 and an ADSPSC835W-EV-SOM on the EV-SOMCRR-EZKIT. 

I'm using a launch group which runs the preload & loads cores 1&2. 50% of the time it works fine, but the other 50% I get..

Error in final launch sequence:

Failed to execute MI command:
-target-select remote localhost:3333

Error message from debugger back end:
localhost:3333: Connection timed out.
Failed to execute MI command:
-target-select remote localhost:3333

Error message from debugger back end:
localhost:3333: Connection timed out.
localhost:3333: Connection timed out.

It seems a lot more unreliable than previous systems. 

The preload OpenOCD console shows

Open On-Chip Debugger (Analog Devices 0.12.0-1.2.0)  OpenOCD 0.12.0 (2025-04-03-09:09)
Licensed under GNU GPL v2
Report bugs to <processor.tools.support@analog.com>
0
adapter speed: 5000 kHz
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : xtensa permissive mode is disabled
adapter speed: 5000 kHz
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : ICE-1000 firmware version is 1.0.2
Info : clock speed 5000 kHz
Info : JTAG tap: adspsc83x.adjc tap/device found: 0x0282c0cb (mfg: 0x065 (Analog Devices), part: 0x282c, ver: 0x0)
Info : JTAG tap: adspsc83x.cpu enabled
Info : [adspsc83x.apb] Examination succeed
Info : [adspsc83x.axi] Examination succeed
Info : [adspsc83x.ahb] Examination succeed
Info : [adspsc83x.sharcfx] Examination succeed
Info : [adspsc83x.m33] Cortex-M33 r1p0 processor detected
Info : [adspsc83x.m33] target has 8 breakpoints, 4 watchpoints
Info : [adspsc83x.m33] Examination succeed
Info : gdb port disabled
Info : gdb port disabled
Info : gdb port disabled
Info : starting gdb server for adspsc83x.sharcfx on 3333
Info : Listening on port 3333 for gdb connections
Info : starting gdb server for adspsc83x.m33 on 3334
Info : Listening on port 3334 for gdb connections
Info : accepting 'gdb' connection on tcp/3333
Info : [adspsc83x.sharcfx] Debug controller was reset.
Info : [adspsc83x.sharcfx] Core was reset.
Info : [adspsc83x.m33] external reset detected
system reset complete
Info : New GDB Connection: 1, Target adspsc83x.sharcfx, state: halted
Info : dropped 'gdb' connection
Info : accepting 'telnet' connection on tcp/4444
Info : dropped 'telnet' connection

When this starts happening, I have to quit CCES, power cycle the board & ICE several times to get comms back up & running.

The debug window shows

Can you advise how to make this more reliable ? 

When it does work, the console shows 

Open On-Chip Debugger (Analog Devices 0.12.0-1.2.0)  OpenOCD 0.12.0 (2025-04-03-09:09)
Licensed under GNU GPL v2
Report bugs to <processor.tools.support@analog.com>
0
adapter speed: 5000 kHz
Info : auto-selecting first available session transport "jtag". To override use 'transport select <transport>'.
Info : xtensa permissive mode is disabled
adapter speed: 5000 kHz
1
Info : Listening on port 6666 for tcl connections
Info : Listening on port 4444 for telnet connections
Info : ICE-1000 firmware version is 1.0.2
Info : clock speed 5000 kHz
Info : JTAG tap: adspsc83x.adjc tap/device found: 0x0282c0cb (mfg: 0x065 (Analog Devices), part: 0x282c, ver: 0x0)
Info : JTAG tap: adspsc83x.cpu enabled
Info : [adspsc83x.apb] Examination succeed
Info : [adspsc83x.axi] Examination succeed
Info : [adspsc83x.ahb] Examination succeed
Info : [adspsc83x.sharcfx] Examination succeed
Info : [adspsc83x.m33] Cortex-M33 r1p0 processor detected
Info : [adspsc83x.m33] target has 8 breakpoints, 4 watchpoints
Info : [adspsc83x.m33] Examination succeed
Info : gdb port disabled
Info : gdb port disabled
Info : gdb port disabled
Info : starting gdb server for adspsc83x.sharcfx on 3333
Info : Listening on port 3333 for gdb connections
Info : starting gdb server for adspsc83x.m33 on 3334
Info : Listening on port 3334 for gdb connections
Info : accepting 'gdb' connection on tcp/3333
Info : New GDB Connection: 1, Target adspsc83x.sharcfx, state: halted
Info : accepting 'telnet' connection on tcp/4444
Info : dropped 'telnet' connection
Info : accepting 'gdb' connection on tcp/3334
[adspsc83x.m33] halted due to debug-request, current mode: Thread 
xPSR: 0x69000000 pc: 0x000074f8 msp: 0x201ff3bc
Info : New GDB Connection: 2, Target adspsc83x.m33, state: halted