Dear fellow nerds, geeks and dorks,
After having a number of private matters interrupt my 3D-printing activities, I managed to make some time for myself and work on the printer. Taking the advise from @jay_s_uk, the last thing I did was update the firmware of the board. The next thing I did, which ended up solving the issue, was updating the firmware of my routers. I made sure the static IP address was set again and now everything works like a charm.
I want to thank everyone in this thread profusely for giving their insights. I will be back to printing figures and gifts, peace!