Bathroom leak x213

[tyg56]

Hello!
New to forum...
After very heavy rain we found water stains on top of toilet lid. No obvious ceiling leaks. Toilet is right be!ow ceiling light. Haven't taken light apart yet (not sure how the cover comes off).
Has anyone experienced this?
Thank you!!

[Saturn V]

What year is the trailer and when was the last time you were on the roof to inspect the sealant around the vent?

Is there any possible way the vent was mistakenly left open?

[Saturn V]

Sweet!