A good remediation for convergence issues is to force the solver to take many substeps. That means setting the Initial and Minimum Substeps to have a large number like 100 or 500 etc. Maximum Substeps should be 1000.

Another remediation is to allow the solver to continue iterations for more than 26 before taking a Bisection by adding the Command object with the code

NEQIT, 100

which will allow the iterations to go to 100 (or 500).