P: Keywords created since upgrading to 11.2 are not coming up as auto complete suggestions

As you can see by the correct answer at the top of the thread your post was merged into, Adobe has acknowledged this bug with 11.2. There is currently no known safe workaround.

I've been archiving and keywording my lightroom catalogging, and after I updated to 11.2 release, the keywording doesn't autofill after I put in a new keyword. 

I've already checked the preferences the auto keyword is on, as well as in the catalog settings. 

The only fix that I've been able to find is to delte my helper file, and the new keywords I put in previously will show up. However new words won't work, so I'd have to quit lightroom, and then delte the helper file, and then the new word I entered will automatically show up in keywords.

Anyone have any idea how to fix this? or is it a bug in the new release?

In the past, you could clear up problems with auto-complete of keywords by deleting the file "<catalog> Helper.lrdata".  But now, deleting that file and restarting LR lets you auto-complete existing keywords but not newly added ones.  

That observation leads to this workaround, which I don't recommend:

1. Exit LR.

2. Do these commands:

cd path-to-catalog-folder
rm -rf catalog\ Helper.lrdata
touch catalog\ Helper.lrdata
chmod 555 catalog\ Helper.lrdata

(These are Mac OS commands. I haven't tested the equivalent on Windows.)

3. Restart LR.

This creates a dummy Helper.lrdata file that LR isn't able to read or write.  Now, auto-complete of keywords works correctly.

However I don't recommend this, since the performance of LR could suffer, not just with keywords, but with displaying folder counts on startup. There may be other bad side effects as well.

I've lost auto completion of text in the keyword tags field. What to do?
"Auto completion of text in the keyword tags field" in preferences is checked.

Only new names for me, previously entered ones auto-complete fine

Both new names and old names.

I updated to the latest Lightroom Classic (2-9-2022) from Mac Big Sur 11.6.3 and I have been doing face reconition and I use to be able to start typing the first letter of the name and it would show all names I have already put in, the more I typed the name, the more accurate the results. Since update, I start to type the letter of the name, it doesn't show all the names that start with that letter and as I type more of the name nothing changes, even if I type the whole name. Is there a setting now I need to change to get correct results of names? Thanks for any help,

Tim