EspSoftwareSerial 8.1.0 not working with ESP32 3.0.1

[ameliaamelia]

My project:
cpu: ESP32_C3 mini
device : LD2420
SERIAL
pin: rx GPIO0, tx GPIO1
baud rate: 115200
SwSer.begin(115200,SWSERIAL_8N1, rx, tx);

With ESP32 release 2.0.14 all goes fine, but with following releases and the last 3.01 no.

Thanks.