"Inflammation, with its cardinal features: swelling, pain, redness and fever, constitute the primal response to infections, irritations or injuries and is partly mediated by PGE2 production [26]. Thus, administration of ibuprofen during the first stages of inflammation can have repercussions on the immune system by interfering with optimal antibody production."

https://www.ncbi.nlm.nih.gov/pmc/articles/PMC2693360/

There is also anecdotal evidence that ibuprofen worsened the conditions of otherwise healthy individuals under treatment in France. I would strongly advise against its use in any covid infected person.