sony.de - login is broken in Firefox

[adguard-bot]

Issue URL (Incorrect Blocking)

https://www.sony.de/mysony/login?returnUri=https%3A%2F%2Fwww.sony.de%2F

Comment

I can't Log-in with active AdGuard for Windows. When press Anmelden (and some captcha), it still stay on that page.
I have disabled Adblock module, privacy module, extension module, but still no success. I need to disable AdGuard entirely to process.
Username: @Morku

Screenshots

Screenshot 1

Screenshot 1 with AdGuard disabled

System configuration

Information	Value
AdGuard product:	AdGuard for Windows v7.16.0 (4542)
Browser:	Firefox
AdGuard driver:	WFP
Stealth mode options:	Strip URLs from tracking parameters, Hide your search queries, Send Do-Not-Track header, Hide your Referrer from third-parties, Hide your User-Agent, Remove X-Client-Data header from HTTP requests, Protect against DPI, Disable cache for third-party requests, Disable WAP Push Message Routing Service, Disable Windows Defender automatic samples submission, Disable Windows Telemetry, Turn off Advertising ID
DNS filtering:	server: AdGuard, DNS, Non-filtering filters: AdGuard Home with AdGuard DNS filter
Filters:	Ad Blocking: AdGuard Mobile Ads, AdGuard Base Privacy: AdGuard URL Tracking, AdGuard Tracking Protection Social Widgets: AdGuard Social Media Annoyances: AdGuard Cookie Notices, AdGuard Popups, AdGuard Mobile App Banners, AdGuard Other Annoyances, AdGuard Widgets Language-specific: AdGuard German
Userscripts:	https://userscripts.adtidy.org/release/adguard-extra/1.0/adguard-extra.user.js

[Alex-302]

Reproduced when all modules disabled, except Ad Blocker. All filters disabled.
@@||sony.de$document or / @@||sony.de$content does not help, only disabling Ad Blocker.

Steps to reproduce

1. Open https://www.sony.de/mysony/login?returnUri=https%3A%2F%2Fwww.sony.de%2F
2. Try to login (I can provide an account)
3. Solve captcha

Expected behavior
Redirect to the next page with the password form
https://my.account.sony.com/sonyacct/signin/?client_id=

Details

Actual behavior
No redirect to the next page.

[Morku]

Why a major browsing related bug has that low priority and is even delayed, did not get into 7.17.0 and even 7.18.0 and is rescheduled for CoreLibs 1.16?

Here is another one: AdguardTeam/AdguardFilters#182643

I had to uninstall AdGuard from familys computer due to this and I feel nervous to reinstall it when Firefox has such low priority for you.