Code review comment for lp:~rpadovani/ubuntu-calculator-app/bumpToolkit

I'm quite puzzled about the bug, it happens randomly, not all the time, probably 1 on 3. I have no idea of which is the root case, and I tried a lot of different things.

I'm sure we've already seen something like this, but I don't remember how we fixed it.
If you have any suggestions, please let me know!