Problem testing device/ multiple device crosstalk

I’ve built a modulation sequencer for push3 standalone that takes control of the button matrix and uses it for certain settings on the device. I have a kind soul who’s been helping me test it at each stage and I’ve run into an issue where for me everything is working as expected but for them the device is having problems with multiple devices “talking” to each other. I’ve set it up as I always have with “s —-dothing “ and appropriately named receives and there are gates in the appropriate places so multiple devices shouldn’t be listening to each other or the push if they aren’t selected. Has anyone had similar issue with device crosstalk or with a user getting totally different results from the same device? I’m happy to share the device if anyone wants to take a look or if anyone has any suggestions on what to look into I’d appreciate it. The biggest issue currently is that I can’t replicate the issue they’re having so I can’t fix it. Thanks:)