loading when moving frames or creating symbols

When i paste in anything or draging a frame in the timeline it starts too loads regardless if it's blank frame or if it has a illustration in it. this was not a problem until the "20.5 update", it takes 5 seconds for it to paste in.

i tried to restart the program but it still acts the same, might be the Mac being old but that shouldn't be a  issue if it worked fine in the past versions of Animate.