Specification only allows one TagWith, whereas efcore allows multiple TagWith calls.

References

1. https://learn.microsoft.com/en-us/ef/core/querying/tags#:~:text=It%27s%20possible%20to%20call%20TagWith()%20many%20times%20on%20the%20same%20query

2. Specification/src/Ardalis.Specification/Builders/Builder_TagWith.cs

   Lines 59 to 69 in b129e30

   	public static ISpecificationBuilder<T> TagWith<T>(
   	this ISpecificationBuilder<T> builder,
   	string tag,
   	bool condition)
   	{
   	if (condition)
   	{
   	builder.Specification.QueryTag = tag;
   	}
   	return builder;