[BUG] when moving to next timestep in testing mode

[aprasad36]

When completing all tests in testing mode for one timestep, the next timestep will flash in testing mode, but quickly swap back to the old timestep's testing graph. The problem can currently be resolved by clicking anywhere on screen, but this is an issue with the callback graph being non-deterministic.

[itsdawei]

@aprasad36 Can you add "steps to reproduce" in the bug report?

[aprasad36]

Steps to reproduce:
Run fibonacci turn off dependency and value testing. Enter test mode, and correctly input all the tests. Sometimes you get this output:

Sometimes it outputs:

[aprasad36]

For reference: it should output the lower image.