Loose cord on power brick?

The wall-to-power-brick cord on my 7U 104hp case is often a bit loose in the power brick. Last night I had my case switched on, but I noticed that the cord was not fully seated in the power brick. Without thinking or switching my synth off, I pushed the cord fully into the power brick. This cased my modules to blink sharply. Everything seems to be working as normal, but is there any risk of damage, either to the power supply or to the modules through this type of action? I’m guessing the LED blinking was caused by the an interruption in the power from the loose cable, but would the capacitors in the “soft start” circuit fully protect the modules from a surge in this case?