Try with 2.18.3 client

Author: bahusoid

src/NHibernate.Test/NHibernate.Test.csproj

@@ -80,7 +80,7 @@
     <PackageReference Include="System.CodeDom" Version="4.7.0" />
     <PackageReference Include="System.Data.SqlClient" Version="4.8.2" />
     <PackageReference Include="System.Data.OracleClient" Version="1.0.8" />
-    <PackageReference Include="Oracle.ManagedDataAccess.Core" Version="2.19.110" />
+    <PackageReference Include="Oracle.ManagedDataAccess.Core" Version="2.18.3" />
     <PackageReference Include="System.Data.Odbc" Version="4.7.0" />
     <PackageReference Include="System.Net.NameResolution" Version="4.3.0" />
     <PackageReference Include="NUnitLite" Version="3.13.2" />