Please submit a support ticket at
support.opensprinkler.com
And attach a copy of your configuration so we can diagnose the issue. This is likely a UI bug (not a firmware bug) that didn’t convert the HTTP data correctly.
The issue turns out to be due to the firmware for OS 2.3 not decoding uri component correctly. It will be fixed in the next firmware. In the meantime, it’s possible to set http station data directly using the /cs API endpoint to avoid the decoding issue.