This is true it is version 0.0.3-13. The latest as "Pick Duration" missing and as coloured Start/Stop buttons.

While I like the new layout I find the grey text on green for the Start button is hard to read.

I have never had the issue above, on any version of cooktimer.
@artpra
What version of CSSU?
What settings are you using in cooktimer's rotation options?
Do you have any steps to recreate it?