Hi, two things:
- Can you get a microprofiler dump when starting play solo? How to post a Bug Report - #14 by Roblox
- Can you try disabling all plugins and see to what extent it improves speeds? Specifically, using the “Disable user plugins in Play Solo” setting? A lot of the work in Faster Play Solo was about disabling Roblox plugins, but even Roblox plugins were already quite optimized for play solo time in ways that user plugins are not/cannot be.