Smartmeter Binding error floods system with unclosed filehandles

Currently using the smartmeter plugin in OH 3.1.

My plugin config is:

UID: smartmeter:meter:Stromzaehler
label: Stromzaehler
thingTypeUID: smartmeter:meter
mode: SML
refresh: 2
baudrate: AUTO
conformity: NONE
port: /dev/ttyUSB1
baudrateChangeDelay: 0
location: HWR

However, when I e.g. remove the USB cable, OH recognizes this via "No provider for port /dev/ttyUSB1 found " but in the background a lot of files are tried to open under “/run/lock/tmp*”.

After a while, OH stops working due to out of file handles.