Events imported by URL to Google Calendar appear as busy & private - ruby

Question

Attempting to import by URL the following ics data by calling an endpoint on an API I'm working on. Google does import the events at the required time and date, but their title is busy and status Private even though the events contain CLASS:PUBLIC. Using icalendar ruby gem to build the ical data.
Also, the API responds with Content-Type: text/calendar header. Trying to import the data below through a file format works fine. The problem is in the URL import. Did not try Outlook/iCalendar. No solutions from other stackoverflow threads worked so far.
Any thoughts as to what might be the problem?
BEGIN:VCALENDAR
VERSION:2.0
PRODID:icalendar-ruby
CALSCALE:GREGORIAN
METHOD:PUBLISH
BEGIN:VEVENT
DTSTAMP:20191120T143449Z
UID:4a22a9b7-8b20-487b-a4fb-bc0b6ff90adf
DTSTART:20191121T070000
DTEND:20191121T130000
CLASS:PUBLIC
SUMMARY:7a Driver
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20191120T143449Z
UID:5eda6340-bfec-417e-869a-d5f1af2ba433
DTSTART:20191122T070000
DTEND:20191122T130000
CLASS:PUBLIC
SUMMARY:7a Driver
END:VEVENT
END:VCALENDAR

Answer 1

This is a problem with the icalendar ruby gem.
I've created a sample ICS file like this:
BEGIN:VCALENDAR
PRODID:-//Google Inc//Google Calendar 70.9054//EN
VERSION:2.0
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-WR-CALNAME:email#domain.com
X-WR-TIMEZONE:Europe/Madrid
BEGIN:VEVENT
DTSTART:20191120T160000Z
DTEND:20191120T170000Z
DTSTAMP:20191120T162746Z
UID:<id>#domain.com
CLASS:PUBLIC
CREATED:20191120T162722Z
DESCRIPTION:busy
LAST-MODIFIED:20191120T162722Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:event 1
TRANSP:OPAQUE
END:VEVENT
BEGIN:VEVENT
DTSTART:20191120T173000Z
DTEND:20191120T183000Z
DTSTAMP:20191120T162746Z
UID:<another-id>#domain.com
CLASS:PRIVATE
CREATED:20191120T162733Z
DESCRIPTION:private
LAST-MODIFIED:20191120T162733Z
LOCATION:
SEQUENCE:0
STATUS:CONFIRMED
SUMMARY:event 2
TRANSP:TRANSPARENT
END:VEVENT
END:VCALENDAR
Events
Event 1
CLASS:PUBLIC
TRANSP:OPAQUE
Meaning that it's a public event and I will be considered "Busy" during it.
Event 2
CLASS:PRIVATE
TRANSP:TRANSPARENT
Meaning that it's a private event and I will be considered "Free" during it.
Solution
I'd recommend you head to the library's Issue Tracker and file a bug report there.