Tried Jumpgate this weekend, took feedback from players, searched forum, issues documented already except the following (or perhaps I did not find it).
Issue #1
Issue statement: Scroll bars on the right and bottom are hard to find, difficult to use depending on background color
Expected behavior: When mouse over scroll bars have greater contrast and are easier to find.
Here is a picture of the bars in the window without mouseover. They are not obvious and don't interrupt the view (appreciated).

Here is a screen shot I tried taking with the bar on the right having been mouse over. Note there is not much difference. Depending on background color it can be nearly impossible to know if you have the bar selected or not.

Issue #2:
Issue Statement: Our game involves cards, treated as images and not tokens (there are no bubbles). When players attempt to play cards from their hand to the tabletop into the pile, the latest played card is not the card on top. It appears that the "layer" order of objects played to the table top is not dependent upon play order, but something else. Did not do exhaustive testing, but appears to be related to the order in which the cards were drawn from the deck. As the GM I attempted to move the card object to the front, but the display order only changed for the GM and not the players.
Expected behavior: Cards or objects moved from hands to the tabletop are ordered with the latest played object on top.
I did not grab photos, and not sure how to show it if I could. The description seems adequate. If the devs need to see it contact me and I can demonstrate live.
Other than these small user complaint, all other issues were previously identified and the players received it well. Looking forward to attempting to copy a game and test out the new copy API feature in the coming weeks. I noticed performance improvements on my end. General receipt is positive.