Hello definitely rct won’t cause bleeding from gums but actually deposits in the teeth Please get a check up done

Get an x ray done to kno the cause . Generally cause of bleeding is not rct it is tartar . For more information check drlillys.com

Rct doesn't commonly lead to bleeding gums. Bleeding is usually due to gum related infection while rct is related to pulp related infection. Both are which essentially not related except in few cases. Visit a dentist and get a x Ray done to confirm the condition of your RCT. Cleaning of your teeth and gums which is called as oral prophylaxis will solve your problem. Also check for food impaction surrounding the treated tooth.

I think after root canal u did not go for crown over that tooth.... please contact ur doctor nd restore ur tooth with crown.... ur bleeding will stop