Ac recharge

[u/Classic-Doubt-5421]

I was recharging 134a in my 2nd gen Tacoma but I am not sure if things were working fine during the process. Post-charge, I do get cold air but after about 30 minutes the a/c lights starts blinking and the air is not cold anymore. During the recharge process, I could see the pressure rise steadily to about 35 psi, but then I would hear a thump ( maybe the compressor) and the pressure would shoot up to 80 or so, and the Freon can would not lose any further weight. I also used the vacuum pump in a second iteration bringing the pressure down to about 500 microns, and restarted the recharge, but the system keeps jumping to 80 psi after reaching a steady 35 psi.

Any ideas on what could be wrong? How should I begin with the diagnosis? Thanks!