This bug was happening for me tonight on 1.14.60 of the Windows 10 client.
Based on the comments above, I was able to figure out that it was because I had wheat on my hot bar. Taking it off my hot bar reduce lag while looking around, and removing it from inventory (putting it in a chest) reduced inventory & crafting lag.
Matthew Lynch
This bug was happening for me tonight on 1.14.60 of the Windows 10 client.
Based on the comments above, I was able to figure out that it was because I had wheat on my hot bar. Taking it off my hot bar reduce lag while looking around, and removing it from inventory (putting it in a chest) reduced inventory & crafting lag.