*PLUMBERSSTOCK EXPERT* responded:
Water slowly leaking into the toilet bowl can be because of various reasons. The toilet flapper probably needs to be cleaned, aligned or replaced. The toilet water fill valve (where water comes in from wall) is leaking in water slowly into bowl. Replace the water fill valve in this case. The toilet small plastic water fill tube is not aligned properly. Or the water gets too high in the tank and overflows. You'll need to adjust the float to fix the overflow. It would be best to have a plumber come and check your toilet. Thank you for visiting PlumbersStock.com.