Yes, I’m surprised this has not come up already. We use our plex account in our house as a family account, always have. Plex seams to not understand that many folks use plex this way and when they roll out features never consider shared family accounts.
I’m sure someone from plex will come back and tell us that we are using plex wrong and that we should have setup dedicated accounts for each person. This same thing came up when they tried to initially force the new continue watching 20 limit rule on us many months ago.
Do also come over to Fully Disable Discover & search results from Streaming Services (More Ways To Watch) if you want to cast a vote to have an option to disable it.
