It's also a very poor design, as it transmits a continuous beam of 38KHz, the TSOP is designed for modulated pulses, and doesn't work properly or reliably with a continuous beam. You should also feed power to the TSOP via a resistor, with a decoupling electrolytic.
But as in post #2, use a processor - you could replace the entire circuit with an 8 pin PIC (12F1840 for example), an IR LED, a TSOP, a couple of capacitors, and a couple of resistors - and another resistor and LED if you want the LED on the output. With such acircuit it would be easy to cure all your issues, and add much more functionality and reliability.