On one of WAN connections I have a 5G router with a fixed gateway that always reverts to a url that has the owner of the SIM card owners information.  Not only for the SIM card but for all the numbers in his name.  To prevent this from happening, I used the Webfilter and chose to use "keyword" and simply added the main company's keyword to prevent any opening of a webpage with that keyword.  Seems simple enough and it worked perfectly.  However ... the performance of the ER8411 dropped dramatically.  On Speed Test the drop in performance was almost 5X less ... and the use experience was incredibly bad.  You press on a link and it takes about 10 to 15 seconds for the webpage to open.  I have now turned off webfiltering and removed that 5G router from the WAN until I can figure out a better way to prevent opening of those webpages.  Is this a bug that needs to be fixed with a firmware update??

Another issue is when I had finally setup the router configuration, I decided to put a more secure password which used an "_".  The password was accepted ... but ... when I tried to log in again ... I couldn't.  I as locked out of my router and the password I put would not work ????!!!!!  I tried the previous password and also wouldn't work.  I had to reset the router and start all over again and have just put a simple alphanumeric password for now until TPLINK figures out what the hell this is !!!  I did get a message from TPLINK support that they are aware of the issue and for now the only way to "fix" things is to reset the entire router and lose hours of configuration???!!! I mean come on this is basic stuff!