It seems pretty safe to assume that if you have an autoimmune disorder that causes heart inflammation when attacking a virus, in some people it may respond to the vaccine similarly. (But again, I think the evidence in such cases is that your body would be much more responsive to a covid infection than an mrna vaccine).
https://www.onlinejcf.com/article/S1071-9164(18)30491-3/full... https://www.ncbi.nlm.nih.gov/pmc/articles/PMC6786665/ https://jitc.bmj.com/content/7/1/53
It seems pretty safe to assume that if you have an autoimmune disorder that causes heart inflammation when attacking a virus, in some people it may respond to the vaccine similarly. (But again, I think the evidence in such cases is that your body would be much more responsive to a covid infection than an mrna vaccine).