Lekemi L880 - watch protocol error - disconnect reconnect

Hi to all, I've a problem with my server (also with demo I tried)
My device, Lekemi L880 watch protocol disconnecting and reconnecting, no gps data location. Logs are this:

2022-04-25 09:09:33  INFO: [96a99342: watch < 5.91.166.170] HEX: 5b33472a393033313831393531382a303035302a5544322c3235303432322c3037353731342c412c34352e3633343935362c4e2c3030392e3139303438302c452c302c3139392c3231302c31332c302c3130302c302c302c30303030303030382c302c305d
2022-04-25 09:09:33  WARN: [96a99342] error - Index 2 out of bounds for length 2 - ArrayIndexOutOfBoundsException (WatchProtocolDecoder:146 < *:253 < ExtendedObjectDecoder:52 < ... < WrapperContext:102 < ...)
2022-04-25 09:09:33  INFO: [96a99342] disconnected
2022-04-25 09:09:38  INFO: [aa453ae0] connected
2022-04-25 09:09:38  INFO: [aa453ae0: watch < 5.91.166.170] HEX: 5b33472a393033313831393531382a303030412a4c4b2c302c302c3130305d
2022-04-25 09:09:38  INFO: [aa453ae0: watch > 5.91.166.170] HEX: 5b33472a393033313831393531382a303030322a4c4b5d

It's a Java problem?
Traccar server v. 4.15

Thanks in advance

Try source code from master. I suspect it might already be fixed there.

Many thanks, I'll try.