Read restart error in read only queries

Hello,

I’m having read-restart error, but I don’t understand why it happens.
This article Read Restart error | YugabyteDB Docs describes case of such error after commit, but my tables are static(still there are writes to other tables that are not touched in problematic queries).
Is it normal to get such errors in read-only quries without any concurrent changes?

 "Exception": "YBNpgsql.PostgresException (0x80004005): 40001: Restart read required (query layer retry isn't possible because data was already sent, if this is the read committed isolation (or) the first statement in repeatable read/ serializable isolation transaction, consider increasing the tserver gflag ysql_output_buffer_size)\n   at YBNpgsql.Internal.NpgsqlConnector.ReadMessageLong(Boolean async, DataRowLoadingMode dataRowLoadingMode, Boolean readingNotifications, Boolean isReadingPrependedMessage)\n   at System.Runtime.CompilerServices.PoolingAsyncValueTaskMethodBuilder1.StateMachineBox1.System.Threading.Tasks.Sources.IValueTaskSource<TResult>.GetResult(Int16 token)\n   at YBNpgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken)\n   at YBNpgsql.NpgsqlDataReader.NextResult(Boolean async, Boolean isConsuming, CancellationToken cancellationToken)\n   at YBNpgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken)\n   at YBNpgsql.NpgsqlCommand.ExecuteReader(Boolean async, CommandBehavior behavior, CancellationToken cancellationToken)\n  

Best regards, Timur