I’m noticing that when a new character (guo2) was introduced and then used immediately in a number of newly introduced words (guo2wang2, zhong1guo2, zhong1gou2ren2), the character was marked as a leech - perhaps leech should not turn on until N days after the introduction of a character to give the user a chance to learn it
(this was seen on the Android app - i’m suspecting the app is doing local logic to determine a number of things separately from the backend and maybe something is not in agreement with the logic?)