I updated to Hype Pro 3.6.7 and I noticed this bug.
When I have an element with the class fixed it will not scroll within Hype and some appear transparent. But, only when zoomed 100% all the way to 3200%. When zoomed at 75% or lower it works fine as it always has.
Using this in the Head Html:
position: fixed !important;
Then in the Identity panel > Class Name = fixed
I have reset all preferences and still there. Also this bug is also found in the latest 4.0 beta.
Thanks for such a great product, use it to make simple basic apps for small ministries.