For me it's been consistently the case that after 2-3 messages, the animation would start to visibly lag, and eventually (on 3rd or 4th reply) slow to a halt, sometimes mid-sentence, completely bricking the session. It's been like this since ChatGPT was first opened to public. I initially assumed it's just the usual case of a bloated SPA, but now I think maybe I'm being throttled on purpose?