Caused by: java.sql.SQLNonTransientConnectionException: Could not connect to md1n4trqmokgnhr.csnrqwqko4ho.ap-southeast-1.rds.amazonaws.com:3306 : Connection reset
	at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.get(ExceptionMapper.java:175)
	at org.mariadb.jdbc.internal.util.exceptions.ExceptionMapper.getException(ExceptionMapper.java:110)
	at org.mariadb.jdbc.internal.protocol.AbstractConnectProtocol.connectWithoutProxy(AbstractConnectProtocol.java:1107)
	at org.mariadb.jdbc.internal.util.Utils.retrieveProxy(Utils.java:502)
	at org.mariadb.jdbc.MariaDbConnection.newConnection(MariaDbConnection.java:155)
	at org.mariadb.jdbc.Driver.connect(Driver.java:86)
	at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:95)
	at com.zaxxer.hikari.util.DriverDataSource.getConnection(DriverDataSource.java:101)
	at com.zaxxer.hikari.pool.PoolBase.newConnection(PoolBase.java:341)
	at com.zaxxer.hikari.pool.HikariPool.checkFailFast(HikariPool.java:506)
	... 149 more

From the logs, the above is the "CausedBy" part. Connection issue with the metastore seems to be the primary issue and unrelated to Delta. you should be seeing this issue for any table.