Adjusting Threshold on S2 Satellites Issue

[Russ-Nasrallah]

When trying to adjust the threshold values on S2 satellite images, If I modify the threshold at all, most of the shoreline disappears.
before:

after:

The adjustment between these two images was very small and yet most of the shoreline digitization has disappeared.

Any thoughts? This behavior only happens on the S2 imagery as far as I can tell.

[Russ-Nasrallah]

@kvos any thoughts on this? I'd like to be able to modify the values but can't if it doesn't work for the highest quality satellite returns. Thanks!