iOS-specific bug on rakuten.co.jp

[ePay4100]

In this website, some issues occur which are never seen on other browsers or safari extensions.
The issues are "delay of displaying page", "radical consuming device's resorces", "crashing or reloading page".
The issues occur with enabling advanced protection with many rules.
It is too much to write here, so I will write the detailed information on next reply.

URL: https://www.rakuten.co.jp/

[ePay4100]

This is the information I have at the moment:
・This issue occurs even if only enabling advanced protection(crashing will decrease).
・This issue seems to be an iOS-specific issue and only occurs when enabling AdGuard's advanced protection.
(No other extension as far as I tested causes this issue)
(It only occurs when visiting the site with safari,won't occurs on my laptop with using AdGuard app or extension)
・The contents of the rules included in the advanced protection have nothing to do with the issue ,but the number of the rules which the advanced protection contains is related to the issue.
・Brave or other browsers appealing ad blocking on iOS (as far as I tested) did not cause this issue. (e.g. Opera GX,Firefox focus)
If you would like to see the results of the tests carried out under the instructions of the maintainer, you can view them on this page: AdguardTeam/AdguardFilters#205261.

[Yuki2718]

Note he already contacted Rakuten's support and got a response that nothing they can. It seems other users have the same issue: https://x.com/blues_ramble/status/1933023193750777877 https://x.com/yura__ri/status/1933021541408911366.