zabbix helm chart: proxy returns "RangeError: execution timeout"

[harri]

Trying to watch the nodes from within the Kubernetes cluster (template Kubernetes nodes by HTTP) the proxy fails to connect. Error messages (using ZBX_DEBUGLEVEL 4):

:
198:20250701:072011.338 End of zbx_ipc_service_recv():2
198:20250701:072011.338 In zbx_pp_manager_process_finished()
198:20250701:072011.338 End of zbx_pp_manager_process_finished() values_num:1
198:20250701:072011.338 In preproc_flush_value_proxy()
198:20250701:072011.338 End of preproc_flush_value_proxy()
198:20250701:072011.338 [16] In pp_execute(): value:Cannot execute script: RangeError: execution timeout
at [anon] (duktape.c:79217) internal
at [anon] (function:272) preventsyield type:error
198:20250701:072011.338 In zbx_ipc_service_recv() timeout:0.500
198:20250701:072011.338 [15] In pp_execute(): value:Cannot execute script: RangeError: execution timeout
at [anon] (duktape.c:79217) internal
at [anon] (function:272) preventsyield type:error
198:20250701:072011.339 [16] End of pp_execute(): value:'Cannot execute script: RangeError: execution timeout
at [anon] (duktape.c:79217) internal
at [anon] (function:272) preventsyield' type:error
198:20250701:072011.339 [15] End of pp_execute(): value:'Cannot execute script: RangeError: execution timeout
at [anon] (duktape.c:79217) internal
at [anon] (function:272) preventsyield' type:error
198:20250701:072011.339 End of zbx_ipc_service_recv():2
198:20250701:072011.339 In zbx_pp_manager_process_finished()
198:20250701:072011.339 End of zbx_pp_manager_process_finished() values_num:2
198:20250701:072011.339 In preproc_flush_value_proxy()
198:20250701:072011.339 End of preproc_flush_value_proxy()
:

I have increased the proxy timeout in values.yaml to 30 seconds, so I wonder WTH is going on? Either the script *can* be executed, but didn't complete in time, or it *cannot* be executed and is rejected immediately. And why doesn't it tell *which* script it cannot execute?

Every helpful comment is highly appreciated.