You have some ghost devices in between which are probably affecting your communication. Try to exclude your lock and pair it again or follow these steps to get rid of the ghost devices. If one of these is a battery operated FliRS device it may be causing an issue as it should not be routing messages: How to find/delete unknown device - failed to update route - #2 by HA_fanatic
Having said that, experience has shown it’s better to use buffering devices with the ST hub for a more reliable operation.