Noun
teething troubles pl (plural only)
(idiomatic) Problems that are to be expected with any new and untried product, system, or venture.
Synonyms: teething issues, teething problems
Captain Edgecombe said the Oriana handled beautifully and had only "very minor teething troubles" on the maiden voyage. Source: Internet
Jennings argued that the problems that have emerged are just routine teething troubles and will soon be sorted out, and that the Attack class is the only boat that can meet Australia’s submarine needs. Source: Internet
There are teething troubles – you hear a stage manager muttering ‘watch your back!’ Source: Internet