For what it is worth, after struggling for almost 2 months to get the fenix 5X Plus and a Forerunner 935 to work properly in open water swimming (GPS will not track), I have abandoned both of these expensive watches and have reverted to my old non-software updated 920XT - which works perfectly in the open water. I have been in frequent touch with Garmin Support and nothing has been achieved in more than 2 months. I am running the latest firmware or beta updates and there is still a massive issue with OWS. For example, I did a 5.6km OWS yesterday in the ocean. The 920 XT clocked correctly and the 935 (which had the latest beta and I was told by Garmin Support would work in the open water) clocked 3.3km.
Garmin, this is not good enough and you need to sort this out. Despite what you may think, you have a major problem in OWS with your top end triathlon watches and they are not now fit for purpose.
