Compressors clutch always engaged and sometimes it engages and disengages repeatedly?

August of 2021 I was running my A/C and the vent started blowing out (it looked like fog). The air was freezing. Around vents started building up condensation. I don’t use the A/C for the rest of the year.
During the winter of 2022, I was running the defrost for a long-time sitting and my compressor clutch started making a metal-on-metal sound. I called a mechanic and he said, compressor was going bad. The noise stopped after some time and the defrost kept working.
As warmer weather came. I started using A/C, the compressor clutch would repeatedly engage and disengage.
I’ve replaced the compressor and condenser. Ran a vacuum and no leaks. Static pressure is around 80 PSI on the high and low side. When I start the A/C low side is 39 PSI and high side 119 PSI, around 90° outside, 45% humidity. Yes, it’s a little low on Freon. Vents blow cold air. After some time (5-10 minutes) the low side starts dropping pressure to 30 PSI and high side stays the same.
When driving, vents are blowing cold. I’ll come to a stop or park the car while still running A/C. The vents start blowing warm air. When I start driving, it will go back to very cold air blowing out. If I don’t stop the vents will always stay cold.
Also finding odd. Some mornings I run the defrost and the clutch stays engaged forever. Other mornings the clutch engages and disengages repeatedly.
My head is spinning the more I research online. Could it be bad pressure switches, check valve, relays or a bad compressor? Any help will be appreciated.
Thanks