(idiomatic) Problems that are to be expected with any new and untried product, system, or venture.
Synonyms:teething issues, teething problems
1941 October, “Novel Armed Freighter Adopted by Navy”, in T. Orchard Lisle, editor, The Log, volume 36, number 13, San Francisco, Calif.: Miller Freeman, Inc., →OCLC, page 58, column 1: