The problem occurs when using elytras either loading new world or already explored terrain.
the use of cpu is excessively high reaching the point that the fans of the cpu are accelerated causing fear that something bad could happen both to the games "in this case to the map" or something worse.

my pc is the following:

CPU: Intel core i7-7700 3.60Ghz
Ram: 16 gb dual channel 2400 Mhz
SSD Drive: 240GB WD
Gpu: Nvidia Gforve gtx 960 4gb.