Submitting exercise only calls the progress observer once with 50% progress

[jclc]

Submitting: arith_funcs
Zipping project  
Submitting project  
 50%[###########################################################                                                           ]Failed: ArithTest testDiv
        expected:<3> but was:<0>

Failed: ArithTest testMul
        expected:<12> but was:<0>

Failed: ArithTest testSub
        expected:<-1> but was:<0>

Test results: 1/4 tests passed
Some tests failed on server. Please review your answer```