MSTP timer triggers mstp_flush() every 1 second, continuously writes STP_INST_PORT_FLUSH_TABLE "state=true" to APPDB

[qianqian-33]

When MSTP protocol is enabled, the MSTP timer mechanism triggers mstp_flush() every 1 second unconditionally.
This causes continuous writes to APPDB under the table:
APP_STP_INST_PORT_FLUSH_TABLE_NAME
with key:
state="true"
Is this behavior necessary for MSTP?