ceiling leaked in 3year old house
We have townhouse build in Dec2014 in our portfolio. In 2017, ceiling in leaving room started leaking, right above it is the 2nd bath upstair. We sent technician and found out that leak was happen because tenant filled up bath tub over the overflow gasket. Then they live about 2 more years and it never leak again. Fast forward, the current tenant has leak again at the same spot. We sent technician to replace the overflow gasket and one day later we get call that it leak again. Is it possible few year old house to leak within walls in ceiling? Thank you.
Note: This tenant has recently started to give us small issues like kitchen sink leaks 2 times; ask for pest control with 1 ant in picture they sent, and tells us everything that he is making his rent payment so he needs to get service on same day. This all started happening after we find out he is leaving there but he is not on the lease.