Here is another tip for you to tackle a possible problem with burst of the DC supply. As usual we at Röcklinger are happy to share our knowledge for those interested in detail construction.
In order to take care of the burst in the input we recommend the following circuit design:
The circuit above keeps + and - together at the feed to the logic. If you still have problems with interference it is usually due to that the voltage across the component supply inputs are different due to different ground capacitance at different locations on the PCB. Usually, the fault lies in the ground plane in these cases.