I am hoping someone might be able to share some insight as to what I can next do to troubleshoot this problem.
In my room I have 3 outlets, the last one in the in circuit is a half-hot outlet connected to a switch by the door (there are no ceiling lights in the room). Everything has been working fine so far.
I decided to replace the 1st outlet in the circuit with a GFCI outlet as I plan on putting a small fish tank in the room.
After I added the GFCI outlet I noticed that it would trip whenever I flipped the "light switch" to the on position. I inspected the light switch and found the ground wire was not connected to the switch and therefore connected it. Now however, the GFCI only trips if I turn the switch on AND there is something connected to the switched part of the outlet. The always powered side of that outlet has worked without issue.
I removed the half-hot outlet to inspect the wiring and it is what I guess I would expect, tab between outlets on hot side removed, no bare or expose wires.
Does anyone have an idea as to what I can look at next?