content_by_lua and access_by_lua not executing in mirror block

Hello,

I'm having trouble running either content_by_lua_block or access_by_lua_block inside a mirror block.

This is my configuration

server {
	listen       8888;
	server_name *;
	proxy_connect;
	proxy_max_temp_file_size 0;
	resolver 8.8.8.8;
	
	location / {		
		mirror /mirror;

		access_by_lua_block {
			ngx.log(ngx.ERR, "Hello world 1")
		}
		
		proxy_pass http://127.0.0.1:8080;	
	}

	location /mirror {

		access_by_lua_block {
			ngx.log(ngx.ERR, "Hello world 2")
		}

		proxy_pass http://127.0.0.1:8090$request_uri;

                internal;
	}	
}

In my error.log file I can see the text "Hello world 1", but not "Hello world 2". I know that the /mirror block is being accessed correctly because I'm monitoring it with Wireshark.

Please let me know if you need any more information.

Versions:
OpenResty 1.17.8.2
nx_lua 0.10.17

Dump of openresty -V

nginx version: openresty/1.17.8.2
built by gcc 9.3.0 (Alpine 9.3.0)
built with OpenSSL 1.1.1g  21 Apr 2020
TLS SNI support enabled
configure arguments: --prefix=/usr/local/openresty/nginx --with-cc-opt=-O2 --add-module=../ngx_devel_kit-0.3.1 --add-module=../echo-nginx-module-0.62 --add-module=../xss-nginx-module-0.06 --add-module=../ngx_coolkit-0.2 --add-module=../set-misc-nginx-module-0.32 --add-module=../form-input-nginx-module-0.12 --add-module=../encrypted-session-nginx-module-0.08 --add-module=../srcache-nginx-module-0.32 --add-module=../ngx_lua-0.10.17 --add-module=../ngx_lua_upstream-0.07 --add-module=../headers-more-nginx-module-0.33 --add-module=../array-var-nginx-module-0.05 --add-module=../memc-nginx-module-0.19 --add-module=../redis2-nginx-module-0.15 --add-module=../redis-nginx-module-0.3.7 --add-module=../rds-json-nginx-module-0.15 --add-module=../rds-csv-nginx-module-0.09 --add-module=../ngx_stream_lua-0.0.8 --with-ld-opt=-Wl,-rpath,/usr/local/openresty/luajit/lib --add-module=/usr/src/chobits-ngx_http_proxy_connect_module-96ae4e0 --with-stream --with-stream_ssl_module --with-stream_ssl_preread_module --with-http_ssl_module

No source file or test is named. Reproduce the supplied mirror configuration with OpenResty 1.17.8.2 and ngx_lua 0.10.17, then trace how the /mirror subrequest reaches the Lua access and content handlers. Done should establish the expected behavior for both blocks and cover it with a regression test.