test_ff_navierstokes_kovasznay fails

test_ff_navierstokes_kovasznay fails for me with gcc 9.3.0. As far as I can tell both UMFPack and dune-subgrid are installed, the test compiles despite UMFPack CMake guard and the macro HAVE_DUNE_SUBGRID evaluates to true. The other two tests in navierstokes/kovasznay pass but when executing test_ff_navierstokes_kovasznay with params.input I get the following error message.

Newton: Caught exception: "NumericalProblem [solveLinearSystem:dumux/dumux/nonlinear/newtonsolver.hh:454]: Linear solver did not converge"
terminate called after throwing an instance of 'Dumux::NumericalProblem'
  what():  NumericalProblem [solve:dumux/dumux/nonlinear/newtonsolver.hh:331]: Newton solver didn't converge after 5 iterations.

[40442] *** Process received signal ***
[40442] Signal: Aborted (6)
[40442] Signal code:  (-6)
[40442] [ 0] /lib/x86_64-linux-gnu/libpthread.so.0(+0x153c0)[0x7f0de4a233c0]
[40442] [ 1] /lib/x86_64-linux-gnu/libc.so.6(gsignal+0xcb)[0x7f0de486218b]
[40442] [ 2] /lib/x86_64-linux-gnu/libc.so.6(abort+0x12b)[0x7f0de4841859]
[40442] [ 3] /lib/x86_64-linux-gnu/libstdc++.so.6(+0x9e951)[0x7f0de4aec951]
[40442] [ 4] /lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa47c)[0x7f0de4af847c]
[40442] [ 5] /lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa4e7)[0x7f0de4af84e7]
[40442] [ 6] /lib/x86_64-linux-gnu/libstdc++.so.6(+0xaa799)[0x7f0de4af8799]
[40442] [ 7] ./test_ff_navierstokes_kovasznay(+0x150d38)[0x55ec2723fd38]
[40442] [ 8] ./test_ff_navierstokes_kovasznay(+0x31bcd)[0x55ec27120bcd]
[40442] [ 9] /lib/x86_64-linux-gnu/libc.so.6(__libc_start_main+0xf3)[0x7f0de48430b3]
[40442] [10] ./test_ff_navierstokes_kovasznay(+0x336be)[0x55ec271226be]
[40442] *** End of error message ***
Aborted (core dumped)```