Planning and saving a 28-step route fails with multiple bugs.

I am trying to plan the following 28-step route with the current ABRP web client:

home

Pfu Hotel by WMM Hotels, Retfordstraße, Pfungstadt

Curocon, Gernsheimer Straße, Zwingenberg

Busbahnhof Bensheim, Am Bahnhof, Bensheim

Ostendstraße 19, Pfungstadt

Curocon, Gernsheimer Straße, Zwingenberg

Hinter der Sandgrube 1, Insheim

Kurtalstraße 57, Bad Bergzabern

Staustufe Iffezheim, An der Staustufe, Iffezheim

Galaxy Energy, Sonnenstraße, Berghülen

Seligweiler Hotel & Restaurants, Seligweiler, Langenau

Käserei Vogler, Simon-Göser-Straße, Bad Wurzach, Germany

Siggenweiler Straße 25, Tettnang

Waltersbuhl (Jufa Hotel Wangen im Allgäu), Max-Fischer-Straße, Wangen im Allgäu

Heizplan AG, Karmaad, Gams

Davos Youth Hostel (Jugendherberge Davos), Horlaubenstrasse, Davos, Switzerland

Caumasee, Flims, Switzerland

Relais Forte Benedek Wine & Spa - Adults Only, Via Morsella, Pastrengo, Italy

Hotel Agli Artisti, Cannaregio, Venice, Italy

Via delle Scalette 3, San Marino, San Marino

Terminal Traghetti Ancona, Molo Santa Maria, Ancona, Italy

Ancona (ITA) -> Πάτρα (GRC) by Anek Lines;Minoan Lines;Superfast Ferries

Patra/South Ferry Terminal, Patra, Greece

Piraeus, Attiki

Πειραιάς - Χανιά (Σούδα) by ANEK Lines;Blue Star Ferries

Souda, Souda

Σικελιανού Άγγελου 7, Ρέθυμνο

Damnoni Paradise, Foinikas, Greece

Bug 1:

Entering the first few stops works well. After about 10 stops, entering a new stop becomes erratic. ABRP does not append it at the end, but at a random position. So I am forced to look for it and move it to the end.

Bug 2:

When the plan is done and I am trying to save it, I get the error message

Oops!

Ein unerwarteter Fehler ist aufgetreten, bitte versuche es erneut. Fuer weitere Hilfe wende dich an unseren Support.

Retrying to save does not help.

Using a different browser does not help.

Bug 3:

When I enter departure and arrival dates&times for the ferry and get back to that dialog later, the dates&times have changed.

So far, I have tried this with firefox and with chrome under Linux.