why is my history rank is unranked?

also I didn't get my plat border and banner, and its shows I am unranked in history rank, but I am plat 5 in mid of season, but my honor level is 1 cuz chat restriction. I saw someone said as long as I am honor level 2 again, the border and banner will show again. is that true?
Best New

We're testing a new feature that gives the option to view discussion comments in chronological order. Some testers have pointed out situations in which they feel a linear view could be helpful, so we'd like see how you guys make use of it.

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