For the longest time, I have had the output log enabled, but a few months ago I noticed that it no longer automatically scrolls to the bottom when a new log entry is created. About 3 month ago, I had Ubuntu dual booted on my computer, and this issue didn't occur there on the on older new launcher (before the new dark themed launcher). However I no longer have a dual boot and cannot confirm that this issue doesn't occur on Ubuntu. Can confirm it occurs on Windows 10 however.