balena-pihole: WARN: Could not accept() in listener() (/__w/FTL/FTL/src/api/socket.c:267): Bad file descriptor

My FTL logs are filling up with this at an incredible rate. GB per day. I hope it’s only on my device but I need to get it sorted asap.

[2022-08-01 11:04:56.679 5613/T5614] IPv4 telnet error: Success (0)
[2022-08-01 11:04:56.679 5613/T5614] WARN: Could not accept() in listener() (/__w/FTL/FTL/src/api/socket.c:267): Bad file descriptor
[2022-08-01 11:04:56.679 5613/T5614] IPv4 telnet error: Success (0)
[2022-08-01 11:04:56.679 5613/T5614] WARN: Could not accept() in listener() (/__w/FTL/FTL/src/api/socket.c:267): Bad file descriptor
[2022-08-01 11:04:56.679 5613/T5614] IPv4 telnet error: Success (0)
[2022-08-01 11:04:56.679 5613/T5614] WARN: Could not accept() in listener() (/__w/FTL/FTL/src/api/socket.c:267): Bad file descriptor
[2022-08-01 11:04:56.680 5613/T5614] IPv4 telnet error: Success (0)
[2022-08-01 11:04:56.680 5613/T5614] WARN: Could not accept() in listener() (/__w/FTL/FTL/src/api/socket.c:267): Bad file descriptor
[2022-08-01 11:04:56.680 5613/T5614] IPv4 telnet error: Success (0)

Will be logging some of my investigation here.