I'm having trouble with disappearing buttons. Sometimes, the buttons on top that you get in the Sheets Overview have disappeared. It happens after switching between different Stacks multiple times, and flicking between the Sheets, opening sheets. Going back and forth. After a while the buttons in the Sheets Overview disappear. Maybe a memory problem. (I'm also have some crashes.) After it happens, the buttons are visible in the Stacks Overview, and with each individual Sheet, but disappear in the Sheets Overview. I have to force quit Daedalus, open again, and everything is cool again.

Thanks for reporting. We saw this a couple of times during development but didn't manage to completely nail it. Although that doesn't help for now: it's been much worse! ;)

Rest assured this issue and most crashes will be gone in the upcoming 1.2 update :)