So whenever I'm running around with my herald upkeeps (4 upkeeps in the screenshot) with the steadfast rejuvenation trait, the trait just randomly turns off. And at the same time, the rising momentum trait claims it has 8 or 10 stacks now. Although I don't really feel the difference in movespeed, the steadfast rejuvenation's healing is indeed gone when the icon disappears. So far I noticed no triggers. I just happens randomly while I'm running around. Also, whenever I enter water with my herald skills are up, the UI says the facets are still being used, but I don't get the boons from them. Steadfast rejuvenation is obviously gone and it says I have 8 or 10 stacks of rising momentum again.
Not sure how to upload photos here, so I'll link an imgur album. https://imgur.com/a/dLJbcae