Originally Posted by
Johnny_extreme
The bike was in a slow speed lay it down crash, and the front brake stopped working shortly after. No damage was visible, however the hose can now be pulled out of the fluid reservoir by just tugging gently. Considering how minor the crash was, it gives me a low opinion of the Shimano MT200. But I'm no expert, so I appreciate the honest answers.
That’s an installation problem, not a system failure. It sounds like someone didn’t properly tighten the hose upon installation. If the bike is new, take it back to the shop. Perhaps take it back to the shop if it is older.