Open Water Swimming - GPS map still not working

What mode did you record that on. I don't recall an open water swim mode on the FR245? I use the RH Sports app, but it's not brilliant at GPS.

THis is under Forerunner 945 not the 245.  The 945 has a swim mode

oops, sorry - I'd looked for FR245 firmware 12.

It looks like you simply don't have a GPS fix. your place is constant for almost the entire duration. I guess you need to keep your hand above water longer

What do you mean by 'this was supposed to be fixed'? There is nothing in the changelog about OWS.

I was told by Garmin that this was fixed in v 12.  It is nothing to do with my hand above water - one day it might be OK, others (when temperature low) it is not.  Same stroke, same pace.

From what I can tell, unless it's in the "Other minor improvements and bug fixes" category.

Forerunner 945
Ver. 12.00 - 02/27/2023
Connect IQ security updates.
Treadmill pace accuracy improvements.
GPS ephemeris reliability improvements.
Garmin Pay updates and bug fixes.
ANT+ radar and light improvements.
When an incident is detected by your watch, a message appears on your watch and phone, and an automated message is sent to your emergency contacts. You can cancel the message from either device.
Fix a bug that could cause us to list emergency contacts who have not opted in.
Fix a Spotify bug.
Fix potential issues with music playback when using Airpods Pro 2.
Fix an issue with special characters in music titles that could cause incomplete playlists.
Fix an issue that could cause repeated syncing of segments, leading to higher battery drain.
Fix an issue with accumulating distance in multisport profiles that contain certain non-GPS activities, like yoga.
Fix a possible issue with large Wi-Fi syncs.
Fix an issue with device bootup when an unsaved activity is present.
Fix a minor bug that displayed the second data screen first when launching Indoor Bike without a trainer.
Other minor improvements and bug fixes.

I was told by Garmin directly.  My bug report was closed.

Possibly they consider it "GPS ephemeris reliability improvement." More likely a miscommunication with Garmin Support. If you expected improvement, but didn't get it, I'd contact support again and reference your case number. I don't do OWS so can't comment firsthand, but I see that from threads here that GPS accuracy while swimming can be problematic.