Are you able to set the profiler log level to trace and IL logging, and share the profiler log? The following environment variables should be set
ELASTIC_APM_PROFILER_LOG_DIR="<log dir>"
ELASTIC_APM_PROFILER_LOG="trace"
ELASTIC_APM_PROFILER_LOG_IL="1"
Set <log dir>
to a directory that the profiler will have access to write logs to.