Preview overflowed

[lazycatx64]

I tried to preview a styled string,
then the result went crazy,
the part that generate random char just spam and froze the web page,
but the string works fine in-game and other preview websites
perhaps you would like to check it out

the string tested:
&6&l&m---&r&8&l&m[--&r &8◆ &4&k;&c&k;&r &fF.Z.&r &c&k;&4&k;&r &8◆ &8&l&m--]&r&6&l&m---

preview result:

expection: