The reset link is being forced too high and is slipping out of it's guide.

This can be caused by weak DT springs (SP-100-314), the spring shaft being located in the incorrect position, or missing entirely, or excessive wear on the plunger or coil stop.

If it is one DT, then check the spring. If it is random (any of the three), it would more likely be the plunger / coil stop.

Compare with the good DT bank. Should be something easy.