Just updated today, first thing I noticed was that the black Xbox cursor had been replaced with a gray pixel Minecraft one. 

Then I logged into Skywars. And I was totally unable to move items around. The reason was that my usual rapid-fire method of moving items had been compromised by significant input lag of perhaps 20+ milliseconds causing me to not reach every box I moved the cursor towards. Upon unplugging and replugging the Logitech G502, the black cursor appeared alongside the Minecraft one, and though it was totally unusable (couldn't click), it was much more responsive, with the Minecraft cursor lagging behind the snappy movements I made to test the lag.

Please bring back the old cursor.

EDIT - If this may be helpful to the mods in any form, I have had multiple people confirm this on their devices, the problem happens across several models of mouse, and the Render Dragon engine that some complain about does not seem to be the culprit. There is a chance that this is simply caused by me not having the greatest hardware (Xbox One S) and so the game lags, meaning the mouse does too, but I still think that this is fixable by using the system mouse.