Rapamycin and stomach ulcers and/or esophagitis

Does anyone have any info or thoughts on the effects on a stomach ulcer and esophagitis? I started taking rapamycin 6-8 months ago and last month an endoscopy revealed 2 ulcers and inflammation in the lower esophagus but no precancerous changes and negative for h. Pylori and no history of NSAID use. I weaned off of over 10 years use of lansoprazole and now was advised to go back on it. I only take 5mg weekly of rapamycin. If the mouth can develop sores, I wonder about the esophagus and stomach?