Allowed vlan remove 2-19 ...., found after reboot on SG350 Cisco Switch

Hi guys,

i have configured an SG350 Cisco switch, with 10 ports on it as trunk ports, these ports are connected to an ip phone and then to pc.

what have i done in details, is that i configured the ports with this config:

switchport trunk allowed vlans all

and i have vlan 10, 20 and 30 with dhcp, 10 for data and 20 for voice and 30 for cameras, all works perfectly, i get vlan 20 on the ip phone and vlan 10 on the pc, but  after a reboot to the switch, the pc wasn't getting ip and was checking the running config on one of the ports, and i found this additional command that was added on its own

switchport trunk allowed vlan remove 2-19,21-4094

how is this coming automatically, am i missing something? or it is a bug?

Thanks in advance!