OpenCL installed but not used by DT

On one of my systems (Manjaro/Arch) I have just made a full system reinstall. OpenCL appears to have gone in correctly but is not seen by DT.

[opencl_init] opencl library ‘libOpenCL’ found on your system and loaded
[opencl_init] no platform (0) detected: Unknown OpenCL error
[opencl_init] FINALLY: opencl is NOT AVAILABLE and NOT ENABLED.

In the DT preferences/processing the driver is shown as being in place.

Any ideas as to what am I missing?

What GPU are you using and what driver version?

Display controller TU116 (GTX 1660)
Installed drivers: opencl-nvidia-470xx; opencl-headers; ocl-icd
Kernel; 6.5.1-1

This is the same set of drivers that I used previously without a problem.
The kernel has changed from previous install.

Did you check via ‘clinfo’ or how do you know?

clinfo shows that ‘device is available’
ICD loader properties
ICD loader Name OpenCL ICD Loader
ICD loader Vendor OCL Icd free software
ICD loader Version 2.3.2
ICD loader Profile OpenCL 3.0

manjaro settings manager shows driver installed.

Today I made a second dt update from the git and miraculously OpenCL is now correctly working.
Life is good again!