This conversation has been merged. Please reference the main conversation: Lightroom: Chokes on large keyword lists (Windows only)
I recently found that on entering the letter "s" in the Keyword Tags box, the screen would blank and then flash. Pressing Esc or any other letter would bring it back.
Having carried out some tests, I have found that this behaviour occurs once there are more than about 1,020 keywords which start with the same letter.
Having counted initial letters of keywords in Excel, I found I had 1,088 beginning with "s". As a test, I increased the number of keywords commencing with the next most frequent character, which happened to be "c". As the number beginning with "c" approached 1,020, the drop down text of suggested keywords (typing "c" in the Keyword Tags box) began to blur, and once it reached 1,020 (approximately), the same screen blanking behaviour as I had on typing "s" occurred. Removing a couple of the "c" keywords stopped the blanking behaviour, adding a couple to replace them started it again.
There seems to be a clear bug which, at least on my Windows 10 system with plenty of RAM, causes Lightroom to choke when searching its database if it contains more than about 1,020 keywords which begin with the same letter being searched.
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