Time step = 206, at t = 2.060000e-01
GMRES_ITR = 8 GMRES_RES = 7.647033e-07
************************************************************************************************
Time step = 207, at t = 2.070000e-01
GMRES_ITR = 8 GMRES_RES = 3.355695e-04
************************************************************************************************
Time step = 208, at t = 2.080000e-01
GMRES_ITR = 8 GMRES_RES = 5.007715e+01
************************************************************************************************
Time step = 209, at t = 2.090000e-01
GMRES_ITR = 8 GMRES_RES = 1.262003e+12
************************************************************************************************
Time step = 210, at t = 2.100000e-01
GMRES_ITR = 8 GMRES_RES = 1.279221e+33
As reported on the mailing list (https://groups.google.com/g/dealii/c/kI-Ii8N0kFU).