Trying to sync from macos rsync to server with openrsync, but delete in combination with exclude arg not working

[TrisDel]

If I try and use the command as follows it doesn't work. Syntax error apparently.

rsync -av --rsync-path=openrsync --delete --exclude "test.txt" tmp openbsd.server:tmp/
building file list ... done
openrsync: syntax error in received rules
rsync: connection unexpectedly closed (8 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at /AppleInternal/Library/BuildRoots/11aa8fb2-5f4b-11ee-bc7f-926038f30c31/Library/Caches/com.apple.xbs/Sources/rsync/rsync/io.c(453) [sender=2.6.9]

if I run it either without --delete, but --exclude arg present, it works. It also works if I include --delete, but not use --exclude. Just together it doesn't want to work.

rsync -av --rsync-path=openrsync --exclude "test.txt" tmp openbsd-server:tmp/
building file list ... done

sent 114 bytes received 16 bytes 86.67 bytes/sec
total size is 12 speedup is 0.09

rsync -av --rsync-path=openrsync --delete tmp openbsd-server:tmp/
building file list ... done

sent 118 bytes received 16 bytes 89.33 bytes/sec
total size is 12 speedup is 0.09

[TrisDel]

Some more verbose output:

rsync -avv --rsync-path=openrsync --delete --exclude "test.txt" tmp openbsd-server:tmp/
opening connection using ssh openbsd-server openrsync --server -vvlogDtpr --delete . tmp/
building file list ...
openrsync: : server detected client version 29, server version 27, seed 200510875
openrsync: : server starting receiver
done
openrsync: syntax error in received rules
rsync: connection unexpectedly closed (8 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at /AppleInternal/Library/BuildRoots/11aa8fb2-5f4b-11ee-bc7f-926038f30c31/Library/Caches/com.apple.xbs/Sources/rsync/rsync/io.c(453) [sender=2.6.9]

rsync -avvv --rsync-path=openrsync --delete --exclude "test.txt" tmp openbsd-server:tmp/
[client] add_rule(- test.txt)
opening connection using ssh openbsd-server openrsync --server -vvvlogDtpr --delete . tmp/
building file list ...
[sender] make_file(tmp,,2)
[sender] make_file(tmp/hello3.txt,,2)
[sender] make_file(tmp/hello2.txt,*,2)
done
send_file_list done
send_files starting
openrsync: : server detected client version 29, server version 27, seed -1025148912
openrsync: : server starting receiver
openrsync: syntax error in received rules
rsync: connection unexpectedly closed (8 bytes received so far) [sender]
rsync error: error in rsync protocol data stream (code 12) at /AppleInternal/Library/BuildRoots/11aa8fb2-5f4b-11ee-bc7f-926038f30c31/Library/Caches/com.apple.xbs/Sources/rsync/rsync/io.c(453) [sender=2.6.9]
_exit_cleanup(code=12, file=/AppleInternal/Library/BuildRoots/11aa8fb2-5f4b-11ee-bc7f-926038f30c31/Library/Caches/com.apple.xbs/Sources/rsync/rsync/io.c, line=453): about to call exit(12)