Definitely sounds like the nozzle is starting too close or actually on the PEI. The pressure built up in the nozzle/hotend eventually overcomes the springs and extrudes in blobs/smears. Once the pressure is relieved, the nozzle goes back to being blocked by the bed. And the cycle starts over until the first layer is complete or until the filament is ground through by the hobbed bolt or slips due to a clogged hobbed bolt.
Anyway… if you’re lucky your auto-level isn’t doing its job. Check that the nozzle and discs are clean of leftover filament, check that the wiper is clean also. Carefully check, it could be a thin film that’s impeding the continuity check.
BTW - This is probably the root cause to your “too stuck” print.
I don’t own a Mini or a Taz 6… so not sure if homing the Z runs through the auto level process or just moves the Z to the last detected nozzle height. Regardless, try to pass a folded sheet of paper between the nozzle and bed. There should be a little drag / friction.
If you can’t pass the folded sheet through, then the nozzle may still be too close. Ensure that the nozzle and discs are clean and the auto-level is working. You’ll need to adjust the z-offset in the firmware… this is where I’ll have to go research the “MXXX” command to, but hopefully some community member can help out.