Safari 15.x Problems

Anyone else seeing a performance drop in the recent iterations/updates in Safari on Mac OS Big Sur?
A couple/few specific notables come to mind.

  1. Closed captioning either doesn’t work, or lags significantly, at various streaming venues.
    Clearing cache, or clearing history can sometimes, temporarily, fix some issues on this.

  2. While trying to add some comments in a resolution request at Paypal
    typing in the comment box did not work, typing keys simply advanced the cursor.
    I had to use Firefox to accomplish the notations.

  3. Also, some general non-function at a couple of government sites.