"Auto show embedded images", "Undo send" settings not saving?

[MasterInQuestion]

    https://account.proton.me/u/0/mail/general

    Toggle "#embeddedToggle" false:     And select "#delaySendSecondsSelect" with "0". [ Minor: "0 second" preferable. ]     Refresh the page:     It doesn't persist?     (and changing other settings onward might be problematic)

    While it probably properly propagated to the Mail:     Loading from new session doesn't seem to inherit.

    Probably known issue:     https://proton.me/support/email-tracker-protection#enhanced-tracking-protection-faqs     https://proton.me/support/protonmail-images     "not synced across our apps"