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This problem has nothing to do with the MIDI Controller. The MIDI Controller simply sends a MIDI signal out from its MIDI ports. In the MIDI standard, the receiving device needs to implement proper isolation to prevent ground loops.
Solution
Usually, Here are some solutions which might work
Use a MIDI Box as an interface. Most (if not all) MIDI Boxes should have an isolated MIDI input which should break the ground loop between the MIDI Controller and your MIDI devices, provided all are isolated power sources and there isn’t a ground loop between your MIDI devices.
Try cutting the ground in your TRS cable might help break the ground loop and solve the noise issue.
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Strymon sells a 5 PIN to TRS cable for their TRS MIDI devices that implements isolation in the cable itself. Please note that this cable is one way (5 pin >> TRS).