Jeeps Canada - Jeep Forums - Coolant leak but pressure holds, going crazy.

Hi, all.
Could really use advice. Will try to be brief.
Jeep Liberty 2010 losing coolant. Seems worse in winter. Found hole in radiator and had it replaced. Replaced rad cap as well (Sant W0133-1634650). Pressure test holds perfectly and used a UV dye as well, no external leaks. No sign of head gasket issue. Had a compression test and looked good but suspect I should have it done again. Not the heater core, dealer tested. No sign of coolant under oil cap or dipstick. Had an overheat issue/stall 2 winters ago. Had starting issues every summer and eventually realized it was due to heat soak, so I wrapped carbon fibre cloth over fuel rails and installed a timer to leave fan on for 3 min after shutdown, no more heat soak issues. Changed water pump, thermostat (Motorad 7420-195 Failsafe Thermostat). I opened the rad cap today and couldn't see coolant but reservoir is full. Now thinking a blockage in the refill hose. I get the occasional misfire in cylinder 2 which I though might indicate a head gasket issue. Changed plugs, wires, coils and ran like a beast. Wondering if misfire only happens in winter. System has been flushed and re-filled. I tested the coolant and the water ratio is correct. It's summer yet when I turn the heat on, it takes quite a while for the air to turn hot and it gets much hotter when accelerating. Blend doors work. There was an issue in past years where the driver side was colder than the passenger side. I flushed the system back/forth with a hose and removed quite a bit of crud. Heat was working perfectly, but still had a coolant leak until rad was replaced. Until today, it seemed like the reservoir was dropping (almost empty) yet the rad looked full when removing the cap. Lately, the reservoir is full and the rad looks empty. No overheating at all. Needle holds steady a half-way mark, even on a 2-hr highway drive. Any help would be GREATLY appreciated! THANK YOU!!