spark-doris-connector，Unknown column 'null' in 'table list'

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I am using the Spark-Doris-Connector​ to read data from Doris, then perform some computations, and finally write the results back to Doris.
When I use the following Java code​ to read from Doris:

String filterString = "cust_no = '111'";
sparkSession.read()
.format("doris")
.option("doris.table.identifier", "busidb.tb_tx")
.option("doris.fenodes", "123")
.option("user", "123")
.option("password", "123")
.option("doris.filter", filterString)
.load();

Then I perform some computations, and finally write the result (allRslt) back to Doris using:

allRslt.write()
.format("doris")
.option("doris.table.identifier", "busidb.tb_rslt")
.option("doris.fenodes", "123")
.option("user", "123")
.option("password", "123")
.mode(SaveMode.Append)
.save();

I get the following error:

query plan failed, exception: errCode = 2, detailMessage = Unknown column 'null' in 'table list'

However, I have printed the columns of allRslt, and there is no column named "null"​ in it.
More strangely, if I read the data using .read().jdbc().load()(e.g., from a traditional database like MySQL) instead of Doris, this issue does not occur.
Has anyone else encountered this problem? Is this a problem with the Spark-Doris-Connector?
My Spark version is 3.4.3, and the Spark-Doris-Connector version is 25.1.0.