If i press jump right after landing, my next jump is very short.

When i press jump right after landing on ground, the next jump is very short (like 3-5 pixels in height). I added the coyote thing and coyote jump from platform has the same issue. My jump is "Hold button - jump higher", but the issue was even with standart jump. I use modified Brackeys controller. Also when i come close to wall colliders, i can start jumping infinite amount of times with these small jumps while standing still, and when i touch wall collider my character is slowed by some reason. I added slip material. At first to character colliders, then to wall colliders, rigidbody, nothing changes. Is someone able to help me please? I have no ideas how to fix it. Thanks