On further inspection, even while using this patch my messages start to disappear and not send when i send a bunch of them in too little time (not super fast, just normal typing speeds).
Damn this is really broken, and IDK what else to change from here because there aren’t any error messages so…
Yeah, default legacy chat seems to still work fine if you don’t have a non-player speaker defined. For now I have just disabled my system messages and that fixed my game.
This can be fixed just by commenting this out until Roblox actually fixes userIsChatTranslationEnabled
This is on line 20 btw
You can report bugs in the bug-support group wdym
NVM problem with my patch again, I should have made it less hastily. It now fully fixes legacy chat. SystemMessages, public chat, and all. EasternBloxxer’s patch likely also works, tho you must remember to remove those changes once Roblox fixes translations if you want translations to work in your game in the future.
Hi all! We’ve turned off this feature as we work on a fix, the issue should go away on a fresh server start. Apologies for the inconvenience caused!
Thank you, I’ve been trying to figure out why this was happening to me.
Just to follow up on this thread, we have a potential fix ready to be merged in! We’d love if any devs with a place that experienced this issue could send us their place so we can thoroughly test our fix before it’s deployed. Just DM me a link to your place + instructions on triggering messages from a non player speaker and I’ll take a look. Thanks in advance to everyone 
Dm’d you an example with screenshots. Thanks for following up on this.