Hi I had a similar experience when I tried to upgrade my dome light and map light on my 19 Crosstrek, the keyless stoped working or flashing, so like you I first checked the fuses, for the center lock, there were fine, then I decided to check the fuses one by one, and I found one bad one 10amp which was ignition coil I think it was burnt, I changed that using spare in fuse box under the hood and that was it, kinda odd experience, also couldn't find a stick to remove them, weird too, so I used my Letherman which works great, hope it helps! Good luck!