Valve Spring - Broken problem found

Just my 2 cents.
Other than metal in the oil. You could replace the valve spring on the effected cyl and do a compression test and see what happens. Some day you will rebuild it.
You will know if the valve is bent.

If the compression is good replace the rest of the springs to be on the safe side
Yes, you will know the if the valve is bent.... especially if you do a leakdown test. The spring can break and the valve not hang very far into the cylinder. You can make a judgement of how far just by laying a straight edge across the other retainers and this one