I got covid during the last two weeks of RGL S5 and missed out on some scrims. I felt bad because our team already never had a set 6th player so they constantly had to find two ringers for a few day so I decided to just play for the remaining week and a half with a 102° fever. Our losers bracket finals ended up being a little over two hours and even going into golden cap and it felt like the longest game I'd ever played because all I wanted to do was sleep.
Another time, during a 3AM pug, my internet dropped out in my area so I turned on the mobile data on my phone with hotspot and used my computer's wifi to connect to my phone and rejoin the game. It worked fine, there was absolutely zero drops or lag but about ten minutes in, I got autokicked because I couldn't connect to the VAC servers for authenticity and every attempt to rejoin gave me the pop-up error of, "Cannot connect to VAC servers". Relaunching the game didn't help, restarting my computer didn't help, I had to re-verify all my TF2 game files just to join servers again. For a split second, I got extremely worried and thought maybe I did end up triggering something to get a VAC ban and that it would be permanent.