Apologies I didn't notice the link you had added in the original post. I also didn't realise this issue also happened with cabled connection too as this changes some of the advice given.
Could you try set a static IP address for the PC, this sometimes works if there is an issue with the router DHCP system.
For steps on how to do this see here:
https://www.howtogeek.com/19249/how-to-assign-a...
Note: This is a non-Microsoft website. The page appears to be providing accurate, safe information. Watch out for ads on the site that may advertise products frequently classified as a PUP (Potentially Unwanted Products). Thoroughly research any product advertised on the site before you decide to download and install it.