When translating an atricle with Content Translaiton, users often find an infobox template in it. Currently, adding an infobox can fail and remain "loading" forever:
There is a proposal to better communicate about templates that cannot be adapted (T192271), but as a first step we should avoid the perpetual loading state and show an empty paragraph when the adaptation process fails instead.
This issue was mentioned in a discussion, translating 1936 Cansiglio earthquake from English to Italian.