While opening the world JEI is not showing, I have to Save and Quit to Title and then reopen the world to make it work. Is this a bug or just JEI bug on their end? It is faster though.

Yeah I'm surprised too, JEI support fabric now haha. I think JEI is better with performance, I dunno, might be wrong too.

Hmmm, I don't have this issue on my end. I'll look into it though!

Oh shit! JEI, not REI. I wouldn't have a clue. I'll have to ask the forge lead about this.

I tested the issue but it works fine with me,
Which Fastload version you are using?
Which JEI version you are using?
Which Forge version you are using?

what other mods are there and provide logs as well.

Issue is stale... unable to reproduce