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Six adaptive methods cannot integrate u' = 1: embedded error estimate is not a difference

Status: Open.

#4403 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 27, 2026

MethodOfSteps(SDIRK2()) on Robertson DDE allocates indefinitely after first-step qmax change

Status: Open.

#4389 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 26, 2026

Inaccurate ForwardDiff event-time derivative through a terminating ContinuousCallback

bug

Status: Open.

#4388 In SciML/OrdinaryDiffEq.jl;

· andreapasquale94 opened on Aug 26, 2026

KenCarp4 default linsolve stalls for MatrixOperator SplitODEProblem

Status: Open.

#4378 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 25, 2026

Downgrade test for OrdinaryDiffEqNonlinearSolve fails at declared dependency floors

Status: Open.

#4377 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas-Claude opened on Aug 25, 2026

reinit_controller! of PIController (errold = qoldinit = 1e-4) causes a period-2 step-size oscillation

bug

Status: Open.

#4371 In SciML/OrdinaryDiffEq.jl;

· termi-official opened on Aug 24, 2026

new_W_dt_cutoff not respected for linear problems

bug

Status: Open.

#4370 In SciML/OrdinaryDiffEq.jl;

· termi-official opened on Aug 24, 2026

AutoSwitch composite with a FIRK stiff member errors: "type CompositeCache has no field iter" in stepsize_controller!

Status: Open.

#4364 In SciML/OrdinaryDiffEq.jl;

· ChrisRackauckas opened on Aug 23, 2026

Eleven algorithms declared adaptive never set EEst, so their step size is uncontrolled

Status: Open.

#4362 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 23, 2026

Solver statistics race when a solver threads its stage solves

Status: Open.

#4349 In SciML/OrdinaryDiffEq.jl;

· singhharsh1708 opened on Aug 23, 2026

QNDF2 and QBDF2 reject many more steps than expected

bug

Status: Open.

#4332 In SciML/OrdinaryDiffEq.jl;

· topolarity opened on Aug 21, 2026

Generalize extrapolant/predictor interface for next state prediction

Status: Open.

#4331 In SciML/OrdinaryDiffEq.jl;

· SouthEndMusic opened on Aug 21, 2026