Is this a new problem or a pre-existing one? What are your project settings? If you are using the Canopus settings, try using the default PPRO ones to see if the problem can be fixed. Also, turn off any background processes to see if that helps. What kind of files are you editing? MPEG or AVI?
Aanarav Sareen
Adobe Certfied Expert, Premiere Pro
https://www.asvideoproductions.com/video