From the description I can’t tell *which* junction the ulcer was found at - if it’s at the ileo-pouch junction then it could be backwash-related, but if it’s at the junction of the ileum and jejunum then it must have a different cause. Backwash ileitis can sometimes become ulcerated.
Any ulcer has the potential to bleed. Some can bleed chronically and some can bleed substantially. And some don’t bleed much at all.
For someone with IBD Crohn’s has to be considered when ulceration is seen, but ulcers are not diagnostic of Crohn’s. Nevertheless, if I were having active ulceration I’d probably choose to advance my treatment from antibiotics to a biologic medication, and I’d choose one that tends to work better for Crohn’s, since I’d ideally like to cover that diagnosis even if it were not confirmed.