I have the same issue but with a Stream Deck MK2

Same issue, with the classic stream deck from Elgato. there is a conflict with Synapses 3 and the Elgato stream deck. only seems to effect the stream deck though. no issues noticed with the mouse and keyboard. makes the stream deck just not worth using though which puts a wrench in things

I’ve managed to fix the issue following this guide: https://www.reddit.com/r/razer/comments/prvd29/the_ultimate_guide_to_fix_razer_synapse_pc_lag/

Same issue. :( 

Also affects Steam VR at the moment

I have the same issue with Stream Deck XL and Synapse 3. Every time I try to use keys as text macros, it lags like crazy! Shutting down Synapse fixes the lag, but then I can't use my synced LEDs.

I have this issue with Stream deck and Synapse 3 as well. If synapse is running, everything on the stream take takes 10X as long to do even if it’s just changing volume. As soon as synapse is closed it’s back to normal.

I had sort of the same problem. One way I found to resolve it was to plug the Stream Deck directly into one of my Razer laptops USB ports instead of using the Thunderbolt dock, which was very inconvenient. I reported this to Elgato, who just said it was a Razer issue.

Hello, i had the same problem. And the unique reason that i found that is causing this using synapse is the Chroma Studio. Once i select for my devices (Naga pro, tartus pro) a static color, the issue is solved.

DOES the RAZER KEYLIGHT now easier work with STREMDECK ELGATO with ANY TRICK or as they shoudl with now complex PASSTHROUGH to fake having a LOUPDECK or RAZER X DECK