When maplestory is enabled my ping in discord gets high take note ive tried different US servers since im connected to NA server of GMS
@shigit27 Sorry for this inconvenience. When you get a chance, please check CDN and Mudfish link for this case.
I think this issue is triggered by CDN (in this case, Cloudflare CDN) because Dicord and Maple Store use CDN for their contents. 
Please check the above link and try to test the workarounds.