Linebreaks are removed since the new Playground

I am having a problem on Ubuntu 16 that no line breaks are displayed in the ChatGPT 4o output, even when I ask for them. I am having the problem on both Firefox 128 (built from source using the defaults) and also with Chrome. When I paste into the vi editor, the problems remain. I tried disabling “wrap long lines” in Firefox about:config, but it did not fix the problem. I don’t have this problem on MacOS… I will investigate to see if this problem is platform-specific or if a change has ruined ChatGPT’s output formatting, which used to look great.