The lifting capacity is 10T and the height is 75 meters. It is estimated that your electric hoist uses a 10T double-acting pulley and a single hook as the lifting device. What type of wire rope are you using? I think it should be a 6*19 IWR φ13.5 or so wire rope.
The reason should be that the force on the wire rope is the same as the twist direction due to the right cross twist (ZS) or left cross twist (SZ) and the wire rope is coiled. If the lifting height is not high, this force may not be too obvious, but the height of 75m should store a lot of force in this section of the wire rope. You can observe whether the wire rope will quickly move forward after cutting it when cutting it. Make a few turns in the twist direction. Similarly, after the steel wire rope is stressed, the steel wire rope within the original twist length will also be stretched, which will also produce a part of the stress in the same twist direction. This is all I can think of.
The solution is When replacing the wire rope, try to straighten the wire rope and place it on the ground as much as possible to relieve the stress (it is estimated that a straight line distance of about 300m is required based on your lifting height). If you cannot do this due to the size of the site, you can replace it later. When fixing the wire ropes at both ends on the drum, use the fixed pulley on the lifting equipment as a fulcrum to straighten the wire ropes on both sides to relieve the stress.