cat inside >() inside tee after flock gets stuck

Configuration Information [Automatically generated, do not change]: Machine: x86_64 OS: linux-gnu Compiler: gcc Compilation CFLAGS: -march=x86-64 -mtune=generic -O2 -pipe -fno-plt -DDEFAULT_PATH_VALUE='/usr/local/sbin:/usr/local/bin:/usr/bin' -DSTANDARD_UTILS_PATH='/usr/bin' -DSYS_BASHRC='/etc/b

BASH_SUBSHELL is not incrementing when part of a pipeline

p commands in pipelines it is not updated or is it rather a bug? Thanks! Kamil Cukrowski