Bug #1: Search not working at all when using Wikiwand in Traditional Chinese (with 'zh-hant' in URL)

For example:
If in article for 'Table (furniture)' with URL (specifically in "zh-hant"):
https://www.wikiwand.com/zh-hant/桌子
then search will give zero results for any search, for example searching for "椅" (chair).

If using URL:
https://www.wikiwand.com/zh/桌子
Then search works fine, but the label "From Wikipedia, the free encyclopedia" at top of page is rendered in Simplified Chinese. The article itself is still rendered in "Traditional Chinese" for some reason (this is the case whether I'm logged in or not in Wikipedia where my preference for Chinese is set to Traditional Chinese).
[ Chrome Language Settings: English, (other languages), Chinese, Chinese (Traditional), and Chinese (Simplified), in that order.
Mac Language Settings: English as primary (interface) language, followed by 'Chinese, Traditional (Taiwan)', and 'Chinese, Simplified' as preferred languages in that order. ]

Workaround #1: use "Chinese" instead of 'Traditional Chinese' option in Wikiwand language menu
Workaround #2: use "zh" not "zh-hant" in URL
Workaround #3: type/copy-paste search term (article title) directly into URL after:
https://www.wikiwand.com/'language-code'/

Bug #2: Traditional Chinese version of some articles appear not to exist (greyed out in Wikiwand language menu) when they do exist

When on English article and want to switch to Traditional Chinese version of the article using the Wikiwand language menu, for some articles the Traditional Chinese option will be greyed out falsely indicating that the page does not exist in "Traditional Chinese".

For example:
If in article for "Adzuki Bean"
https://www.wikiwand.com/en/Adzuki_bean
then "Traditional Chinese" option is greyed out, whereas the page does exist at:
https://www.wikiwand.com/zh-hant/紅豆

Similarly, the "Traditional Chinese" article "電腦" (computer) is greyed out (inaccessible) from the "Chinese" page, whereas it is not greyed out from the English page.

Workaround #1: use "Chinese" instead of 'Traditional Chinese' option in Wikiwand language menu
Workaround #2: switch to other languages to see if target language article page is not greyed out
Workaround #3: try to translate article title into target language and type/copy-paste directly into URL after:
https://www.wikiwand.com/'language-code'/

Bug #3: (minor bug) Article title in URL always renders in Simplified Chinese, even if "Traditional Chinese" is selected and "zh-hant" is in the URL [same issue with Wikipedia].