I started having this same problem and it was after I installed an "upgrade" of ELLO and/or EL (even though it still said I was on the old version

. In the past, if you made sure that the title in ELLO and the tag were the same, it would find the lyrics. Or you could just push the EL button in ELLO with the correct lyrics up, now that doesn't work either.
But you can do it - just copy and paste the lyrics from ELLO manually into EL and then edit and timestamp, then save them back to the same file. You may have to delete the old files (previous to editing the lyrics) that might have a slightly different name. I know it is extra work, but...
If you fool with it, you can get it to work.
I'm going to go get an older version of EL/ELLO and reinstall. I think that will solve the problem.
I think the main guys on this board have pretty much checked out - so looks like we're on our own trying to figure this stuff out!