... If, as I initially stated, carbon build up between RL2 pins 8 and 12 even though RL2 is not energize, it's possible residual ALC voltage may still be applied to some extent to V3 resulting in your receiver recovery problem. Therefore, try cleaning both relays. ...
About 30 years ago, I bought an SB-102, and if I recall, many circuits are very similar to the HW-101. I had the same problem.
It was owned by a heavy smoker. My problem was solved by cleaning the tobacco smoke residue off the circuit board in the right place. (Don't ask me where, it's been too many years.) That AGC circuit is extremely high impedance, and that dirt and residue was conductive enough to cause problems.
In discussing this fix with another ham, he told of some Heath circuit boards -- they were paper phenolic that turned darker brown with sustained ambient heat -- that had turned very dark brown and actually became conductive enough to cause the same problem as the smoke residue. The fix there was to take a small section of board out of the circuit.
I know it sounds strange, but it solved my problem. Hope it helps you.