I only have reliable knowledge about that for the area of the HRE, so if there were example for this in western europe (France + England+ Iberia) I would like to call out someone who knows about that.  

For the area of the HRE (Holy Roman Empire) it was common for the Imperial Corunation. In the early medieval it was usus, that it would be in Rome by the Pope. Since it was back in the time a huge effort to come to Rome from Germany, even for a would-be-emperor, it was often delayed for a long time.  

Because the fact, that power was very decentralized, leaving your main domain for a long time to go to Rome would provoke a uprising from your local princes.  

For the case, that a german Emperor in spe would die before he got to Rome for a coronation he would still die as the german King, since the german Crown was a prequesition for the Imperial title. Often emperors had their successor already corunated german king in a very young age, to cement the childs claim on his fathers titles early on (Just in case, you know people died very early back then).  

Most of the time corunations were delayed because civil wars between claimants or oposing would-be Kings, supported by a rebellious nobel faction. Often the traditional corunation sites were not in reach. (For Germany it was Aachen) A example for this was in France in the time of Jean of Arc. She had to conquer the traditional french corunation town of Reims, before Charles VII could go there for his corunation (I consider the english claims not legit for this perspective).  

An another example of a delayed corunation would be Sigismund Luxenburgian. He was a german Emperor, Hungarian King, etc, etc...(the list is long) and the titular Bohemian King (Since his brother, the former king died childless). Bohemia was at that time in the hussite war, so it took Sigismund a year before he could get to Prague and get himself corunated (And after that he hastly left the town, because, you know, warzone and that).  

A last example would be Trajan a (ancient) Roman Emperor. I know, you asked for the medieval times, but I consider him being noteworthy for the toppic. He was the first adopted Emperor. And he stayed for 2 years away from Rome near the germanian border. The most thought, that he would prepare a new germanian campaign, but some think, that he simply waited to lure out potentional troublemakers in the capital.  

(Remember the roman legions were stationed in the provinces and Italy itself was de facto without troops. If there would be a uprising or a rebellion, he would have no loyal soldiers in Rome, since the Pretorian Guard was not exactly seen as trustfull. If there would be a rebellion, he could simply gather the Legions from the Rhine and move into Italy)

(Sorry for English mistakes)