Cool, thanks. So i have to set this width by code?
Yes. Set it for the first button before cloning. 
Sure, will do that. Thanks!
But wouldn’t 10% do the same thing?
This works great! I’d forgotten to delete the flex wrap 
Good question. I’ve had enough times where Thunkable packing got weird that I like absolute sizing. But if you have zero margins, then 10% /should/ work. Unless it doesn’t. 
And it’s happening again.
You can try ABD logcat for that as I mentioned in the beginning. My app also stops sometimes but I fix it using that. Just try and see it