I swim about two times a week, and after having my Venu 4 for about 4 months now I haven’t had any issues with the swim activity. I usually let it auto track my laps, being sure to keep my arm still when I’m resting so it doesn’t think I’m doing another lap, and I use the drill log to manually log laps when I’m using a kickboard. I did not swim at all last week, and then when I went to use the swim setting this week, the main rest screen looked different. It already had about 24 minutes for the interval time, 38 minutes for the rest timer even though I just pressed start. There are tiny numbers off to the side of the screen that I’ve never seen before. And it seems to glitch about 5 seconds in and the rest timer goes to 0 and the repeat on goes to a different time. And, it’s not properly tracking my laps. I will swim a 100m and it will register as 25 and about 8 seconds. Picture below!!
I am guessing the update did this?! Since that’s the only thing that changed since I last swam. I haven’t contacted Garmin yet but wanted to see if anyone else is having this problem.