Google Calendar - When Importing an ICS Calendar through an URL, it doesn't set alarms/reminders

I'm working on a PHP environment with the Laravel Framework.

I have a route from which I generate an ICS file, that can then be downloaded or imported directly into a calendar.

When I import my calendar into iCalendar, it all goes according to plan: Every event is set, every reminder is also scheduled correctly.

But, when importing the calendar into Google Calendar, though every event is imported, I find the following problem:

1. When imported through a file, the calendar assumes every event has an alarm set for 10mins. before, though he sets the alarms of the events that have them correctly;
2. When imported through an URL, the calendar doesn't set any alarms.

Here's an example of the code generated for each event:

BEGIN:VEVENT
UID:218074
DTSTART:20170407T093000
DTEND:20170407T100000
DTSTAMP:20170407T093000
CREATED:20170405T115710
DESCRIPTION:Hora Início: 09:30\nDuração: 00:30\nHora Fim: 10:00\nEntidade: Inovcorp\, Lda.\nCategoria: Desenvolvimento\nTipo: Gestão\nAcção: Reunião Skype / Hangouts\nPartilha: Tiago Caetano\, Rúben Carvalho\, Pedro Conceição\, Nuno Conceição\, Miguel Romão\, Luis Castanheiro\, João Silva\, João Rio\, João Frazão\, Filipe Lopes\, Augusto Lopes\, André Santos\nDescrição: Reunião sobre Gestão de Projetos.\nEstado: Aberto
LAST-MODIFIED:20170407T093000
SUMMARY:Inovcorp\, Lda. - Desenvolvimento - Gestão
SEQUENCE:0
STATUS:CONFIRMED
TRANSP:OPAQUE
BEGIN:VALARM
ACTION:DISPLAY
DESCRIPTION:REMINDER
TRIGGER:-PT15M
END:VALARM
END:VEVENT

Is there something I'm doing wrong? Is there a configuration on Google Calendar I'm missing that removes/sets alarms? Is there a way to fix it?

via Filipe Lopes