I have two different triathlons in multisport with the same issue: the open-water tracks the distance, strokes, time, pace, etc just fine, but the GPS maps are... incomplete? No issues on the bike or run. And this issue is not replicated in a single sport open-water swim activity, only multisport with open-water swim. Here are two examples:
Example 1, Software: 26.00: https://connect.garmin.com/modern/activity/11315331880/1
Example 2, Software: 22.10: https://connect.garmin.com/modern/activity/9351804473
Is this a bug? Thanks.