First Time RAM Disk good after that very slow

Hi,
The first time ran qiling ram disk it installed well and CrystalDiskMark showed read and write speeds of 4988 to 7446 MB/s. Unfortunately, I installed OSFMount which was a little faster but after that Qiling RAM Disk speed dropped to 35 MB/s. I tried everything and even uninstalled all three RAM Disk - Img, Qiling & OSFMount, rebooting and installing Qiling RAM Disk but speed still 35MB/s.

What should I do now to restore original speed of Qiling Ram Disk?

Thanks