Thank you for the feedback! We are glad you enjoyed it.
1) We will be looking into how to solve this!
2) We believe the Test Tube interaction is solved in the latest patch but will continue testing and patching! As well as checking to see how to better solve the immediate packaging. We also added a fix to respawn an item if it falls through the map!
3) Do you remember what task you did before this happened?
4) Yes, sadly the way the cursor is drawn can be a little jittery. This may not be able to be fixed before the bug fix period is over.