Weird issue: Screen savers HAMMERING the CPU

I've upgraded my distro from F33 to F34, F35, and now F36. Zero issues all the way through except for one weird one. I run Xfce, and I installed the xscreensaver* packages. I've always done this, and I uninstalled the xfce4-screensaver package. I like the plain old xscreensaver packages. It's not been a problem before (that I recall), but now all of sudden several screen savers just hammer the CPU. To the point where I can't even get the popup screen to enter my password to appear. Or after it appears, it takes MANY seconds for the password to be checked, and it seems like it's dropping characters because I am reasonably certain I typed it correctly, but it hangs and I have to wait til the login screen pops up again. Anyone else seeing this? Is the only option to go through and test each one to see if they cause problems, and disable them? Thanks! Thomas