If someone requests https://query.wikidata.org/querybuilder/ and 10 minutes later https://query.wikidata.org/querybuilder/?lang=fa is requested, then the Edge Cache's Time To Live (TTL) for the asset files (js, css) referenced by both will expire 10 minutes earlier than the TTL for https://query.wikidata.org/querybuilder/?lang=fa that references those files. If within the TTL for https://query.wikidata.org/querybuilder/?lang=fa a new release is deployed, then it will be broken for the time from when the asset TTL expired until itself expires and is replaced with the current version that references the correct assets.
Worst case, this could mean some query builder links being broken for up to an hour after deployment.