well, its funny you should observe that, because I’ve had the same experience. Whilst on Amitriptyline which pretty much stops the migraines (but does not prevent all vestibular attacks) I have found coffee to be at least enjoyable and sometimes makes me feel better too :). I cannot explain that tbh.
btw my personal opinion is that though migraine as the perpetrator of MAV is a current popular medical hypothesis, I’ve not read any evidence that proves migraine is causing the condition though. My personal hypothesis is this is a condition related to physical disturbance in the inner ear that is less severe than, say, menieres, but nonetheless causes debilitating symptoms in the patient albeit with no significant hearing loss. In my view the migraine is one of the results, not the cause of the condition. I note migraines are also a regular occurrence for sufferers of menieres and BPPV. I was very disappointed to learn that current scanning techniques cannot resolve the inner ear with sufficient detail to rule out a physical cause, therefore to me this diagnosis is pure dogma, based on observations and medical response only and there is a lot of uncertainty around it. Hain notes that Menieres and MAV are very similar and may be part of the same spectrum of conditions. This is very compelling.
PS I’m aware this opens a can of worms, but I believe we are owed a reasonable and proper explanation for this horrible condition, not simply fobbed off with drugs! I know my consultant is doing their best but in my view the science is severely lacking and this needs to be resolved asap.