Usals motor issue moving from horizontal to vertical frequencies

Hello! I have a problem when I am trying to switch from horizontal to vertical transponder on another satellite with stab usals motor. The dish won't go to the specific satellite but keeps moving. However, this is not happening when switching from horizontal to horizontal transponders between satellites. BTW I have an Octagon SF8008 enigma2 receiver and a quad lnb. Is anyone experiencing the same problem? Is there any solution?

Thanks in advance

Thank you for your answer my friend. I changed the lnb with two different quads that i have , but still the same problem with both. I dont't know if it's related to quad's lnb higher current consumption compared to single's or twin's.