If you are using a BCM4350/DW1820A Wi-Fi card or an XPS 13 9350 on Linux, you may have run into an issue where your Wi-Fi stops working after suspension/sleep. Hopefully my hours of research can help you.
It appears there is some kind of power management problem with this card. There are several different threads documenting these issues (I'll link them below). These issues were officially resolved sometime around kernel 4.19 but I'm still experiencing them and I imagine some other people might be too.