Enhancing speech - forgetful & slow

So… I love enhanced speech and frequently apply it to my sequences clips.
But sometime I find I open a project and the sequence has forgotten its enhanced speech “renders”(?) on some of the clips and has to redo them. And that process can take so long. I’ve had my project open now for about 30min and it still isn’t done
Yes my “add ons” are installed.

So…how does it forget where they are?
And why so slow? Is it an Adobe server issue?
Anyone having the same issues?

Thx!