11.5.3: Confusing Ressource limit Notifications on UNLIMITED subscription plans

[azurro]

Since upgrading to 11.5.3 i'm receiving notifications on exceeded ressource limits, though the corresponding subscription plans are in fact unlimited.

The 'xxxxxxxxxxxxxxxxxx.at' domain, owned by user account 'xxxxxxxxxxxx', is approaching or already exceeded the limits:
Speicherplatz: Unbegrenzt / 15.1 GB verwendet / Unbegrenzt

The 'xxxxxxxxxxx.at' domain, owned by user account 'xxxxxxxxxxxxxx', is approaching or already exceeded the limits:
Speicherplatz: Unbegrenzt / 24.7 GB verwendet / Unbegrenzt

As you see, the unlimited ("unbegrenzt") status is properly saved and detected, but the confusing warning is sent to the client anyway,
I'd like to correct this, without disabling notifications at all.

More Info: The base subscription plan for these domains has some - lower - limits set, unlimited ressources are added by an add-on plan.

Regards
Thomas