Solution diverging at 100% load factor

I am currently working on conducting a snap fit analysis (multiple snap fits on the component), I tried running the program by dividing the total motion into several loadsteps (Incrementing the motion slowly). The solution converges smoothly until it reaches 100% loadfactor for the first loadstep, and suddenly the analysis begins to diverge. Trying to solve the issue instead of giving enforced displacement I tried giving force as input parameter, just to check what displacements can we see on applying the load. Here again I see similar trend, the solution converging smoothly till 90% loadfactor and diverges at next ie 100% loadfactor on 1st loadstep. Is this some bug or am I doing something wrong ?