Truck will only shift when in 4HI or 4LO

[BudgetB3000]

Recently just began encountering this problem with my truck. I've been using 4HI and 4LO quite a bit as it is winter and snowing daily. As of this morning, my truck will only shift into gears if I first engage the truck into either 4HI or 4LO. What gives? This seems like an extremely unusual problem. The car will shift gears once I switch it back out of 4x4, but in order to get into any gears I must put the truck into 4HI or 4LO first. Anyone have any ideas as to why this could be? My truck is a 1998 Mazda B3000 5 Speed 4x4 3.0.

 

[BudgetB3000]

I just replaced the clutch, master and slave cylinder, pilot bearing, and all other related parts and the car has been running flawlessly for 1k miles so I’m at a loss. Once the clutch is in, I can engage any gear. I can also engage gears just fine with the car moving. This only happens once I stop so currently I’m having to hold the clutch in at every light I hit